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Auctions guide

Junk Mechanics Auctions and Cars & Bids Guide

Auctions are the fastest way to see rare cars and the fastest way to lose Cash. This page explains the two auction types, where Premium Auction Keys come from, which cars are tied to auctions, and the player-versus-player Cars & Bids system added on October 3, 2026.

Last checked Sources listed below
Quick answer

Treat auctions as a rare-car lottery, not income: spend free keys first and set a hard budget

Cash auctions cost in-game Cash; premium auctions need Premium Auction Keys, which come from codes, tasks or Robux (the Store sells 1 key for 99 Robux up to 50 keys for 2,999 Robux). Community guides agree premium auctions give the best shot at Tier 4 and Tier 5 cars, but the game itself warns auctions are not meant to be profitable. Cars & Bids is different: every hour at the luxury dealership you bid against other players for a car, so you can see what you are paying for before you commit.

Cash auctions versus premium auctions

The auction area has two kinds of auction. Cash auctions are paid with the Cash you earn from flipping. Premium auctions cannot be opened with Cash; they need Premium Auction Keys. Both can pay out Cash or a car, and both are random. You will also meet Rick here, who offers to quick-buy your car. His offer is reported to be well under value, so do not sell finished flips to him (see the selling guide).

The two auction types at a glance
Cash auctionPremium auction
Paid withIn-game CashPremium Auction Keys
Where keys or Cash come fromFlipping cars, driving, jobs, codesCodes, daily and weekly tasks, or Robux
Typical resultMostly Cash or common cars; rare cars are possibleReported best odds of a Tier 4 or Tier 5
Main riskLosing Cash you needed for the next flipSpending Robux on a random result

In an August video one player showed the worst cash-auction outcome at that time as $10,000 with roughly a 40% chance, and showed the game's own warning that auctions are not meant to be profitable and that you should only spend if you want a rare car. Odds have been adjusted since then, including a reported increase on October 3 for some cars that used to sit at about 0.01%, so check the odds panel in your own game before spending.

Where Premium Auction Keys come from

  • Codes. Several codes have given keys, including DELAYMECHANICS, ANOTADELAY and KA-CHOW (two keys on camera). Check the codes page for what is live now.
  • Daily and weekly tasks. Tasks were added in mid-August and pay Cash, sometimes cars, and keys. An August 24 video showed a weekly set worth five keys that included selling 100 vehicles, so treat weekly keys as a long-term reward.
  • Robux. The Store sells keys directly, priced below.
Premium Auction Key packs in the Junk Mechanics Store (Roblox, read October 5, 2026)
PackPrice (Robux)Robux per key
1 Key9999
3 Keys259about 86
10 Keys769about 77
20 Keys1,399about 70
50 Keys2,999about 60

The Store also lists an item simply called Auction for 79 Robux (an early-August video showed a similar Robux auction at 59, so prices move), plus gift versions of each key pack. Bigger packs cost less per key, but they also make it easier to spend more than you planned. Decide on a number before you open the Store.

Cars tied to auctions

Some cars appear only, or mostly, through auctions. The game uses fictionalised badges (for example a Porsche-style car badged Ferdinand), so community videos often use real-world names. The list below records what each update video reported; your in-game index is the final word on where a car can be obtained.

Auction-linked cars reported in update videos (names as used by the source)
Car (as reported)How it was reported to be obtainedReported on
GT3 RS-style car with Ferdinand badgesAuction-exclusive at launch; listed at about 2.5 millionAugust 16–18, 2026
Testarossa-style carAdded to the auction listAugust 16, 2026
Corvette C7-style carJunkyard plus cash and premium auctionsSeptember 5, 2026
Trackhawk-style SUV with supercharged Hemi V8Auctions (premium and cash)September 5, 2026
Huracán-style car (heard as Pegaso Tornado)Premium auctions and Cars & BidsOctober 3, 2026
Mercedes CLK-style Tier 5Now auction-onlyOctober 3, 2026
Lexus LFA-style Tier 5Now auction-onlyOctober 3, 2026

A creator raised a fair concern on October 2: there is no timer showing when an auction car leaves the pool. If you are chasing a specific car, assume it could rotate out with a future update and do not stockpile keys forever.

Cars & Bids: player-versus-player bidding (October 3 update)

The New Vehicles and Auction! update, which Oil Leak listed as a Roblox event from October 3 to 10, 2026, added Cars & Bids. It shows on the map at the luxury car dealership (Mr. Lupin's), where an NPC called Ginger runs it. The in-game description, read aloud in an update video, says you bid against other players to get vehicles before someone else does, and that bids start every hour.

  1. Drive to the luxury dealership and talk to Ginger, or watch chat: a new round is announced (for example "Rookie Bid starting now").
  2. Look at the car on offer before bidding. Unlike a random auction, you know what you are bidding on.
  3. Place a bid. Other players in the server can outbid you, so a busy server can turn into a bidding war.
  4. If you win, the game teleports you back to collect the car.

Rounds have tier names. Videos showed Rookie Bid and Amateur Bid, and the Store lists items with exactly those names for 29 and 79 Robux. What those items do is not described on the Store; one creator used a Robux option to skip the waiting timer. We have not confirmed whether higher rounds exist or which car tiers each round draws from, so do not assume Amateur means Tier 4 or higher.

A sensible auction budget

  • Spend free keys from codes and tasks before any Robux.
  • Keep enough Cash for your next junkyard car before opening a cash auction. A September session showed a player starting with about 5 million and burning through millions to land two Tier 5s; that is the scale of variance involved.
  • If you win a car you do not want, restore and sell it properly instead of quick-selling to Rick.
  • Stop after a fixed number of opens, win or lose.

For under-18 players, auctions that cost Robux are the part of the game where parents most often want spending limits. Our parents' guide explains the Roblox controls.

Frequently asked questions

How do I get Premium Auction Keys in Junk Mechanics?

From key codes, from daily and weekly tasks, or by buying packs in the Store (1 key for 99 Robux up to 50 keys for 2,999 Robux on October 5, 2026).

Are auctions worth it in Junk Mechanics?

Only if you want a rare car. The game itself warns auctions are not meant to be profitable, and flipping junkyard cars remains the reliable way to earn.

What is Cars & Bids in Junk Mechanics?

A system added on October 3, 2026 at the luxury dealership where you bid against other players for a car. Rounds start every hour.

Which cars are auction-only?

As of the October 3 update, videos report the Mercedes CLK-style and Lexus LFA-style Tier 5s as auction-only. Check your in-game index for the current source of each car.

Should I sell to Rick at the auctions?

No. Rick's quick-buy offer is reported to pay well under value. Sell restored cars to a dealer instead.

Sources and how this page was checked

Key and item prices come from the Junk Mechanics Store on Roblox, read on October 5, 2026; Roblox prices can change. Auction behaviour and Cars & Bids details come from update videos recorded between August 4 and October 5, 2026, including the in-game description read aloud on camera. Drop rates change between updates and are not published on a stable page, so we do not quote a current odds table.

Spotted something out of date? Send a correction. Read our source standards.

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