Two listsMystery Keys on MM2 Values vs Supreme Values
from supremevalues.com, the other community list. Why they differ50% between the two lists means there is no settled price yet. Go carefully.
How much is Mystery Keys worth in MM2?
Mystery Keys sits at 2. There are 13 priced misc items and this is number 8. Line up all 1,072 priced items and it is number 536. Compare it with Box of Gold Papers, the tier leader at 4, or 2x this. A typical misc is worth 2. This one runs about the same as the normal price.
At 2/10 not many people are asking. Add Mystery Keys to a bigger offer. Supply and interest are about level here, so the number on this page is the number you will get. No big swings recently. The number has been quiet for weeks.
To match Mystery Keys you want 2x Xeno Knife (1 each), or 5x Nuclear (0.4 each), or 10x Treats knife (0.2 each). Slot it next to Web (1) and Box of Fert (2). Those are your substitutes.
Fair offers for Mystery Keys
Stacks that come out close to even against Mystery Keys's 2.
| Offer | Each | Total |
|---|---|---|
| 2× Xeno Knife | 1 | 2 |
| 5× Nuclear | 0.4 | 2 |
| 10× Treats knife | 0.2 | 2 |
Counts are rounded, so each row sits within a few percent of the target. For exact figures use the trade calculator.
A quick word on misc items
The leftovers drawer.
If you are looking at this category hoping to find something valuable, you can stop. There is nothing here.
The only real use for this category is knowing what the odd item in your inventory actually is.
Items similar to Mystery Keys
Closest misc items by value. Useful for stacking or substituting in a trade.
Mystery Keys: quick answers
How much is Mystery Keys worth in MM2?
Right now Mystery Keys is worth 2. That was true on September 2026 and it holds 8th place out of 13 misc items.
What can I trade for Mystery Keys?
Even swaps look like 2x Xeno Knife, 5x Nuclear, 10x Treats knife. Mix and match, as long as it comes to about 2. Run it past the calculator first.
Is Mystery Keys rare in MM2?
Rarity is rated 3 and demand 2, which puts it in the TIER 3 bracket of misc items. Plenty are out there, so supply is not what holds these trades up.
Is Mystery Keys worth more than Box of Fert?
No. Box of Fert is worth 2 against 2 for Mystery Keys. They sit next to each other on the list, so a straight swap is close to fair but tips slightly toward whoever gets Box of Fert.
Value last changed September 13, 2026. That is when the community trade feed we read was last rebuilt, not when you loaded this page. We pick up a change within ten minutes of it being published. The notes above are written and kept up by the MM2 Values Team, and how we source and check everything is in our editorial policy.
MM2 values are player-driven trade units. They are not Robux and carry no real-world money value.
Background on how Mystery Keys was obtained and released: Mystery Keys on the Murder Mystery 2 Wiki