The short version

• — Every item has two source values, from MM2Values and Supreme Values, refreshed every 12 hours.
• — The RBLXValue estimate is the average of those two values. If only one source lists an item, that value is used.
• — Once a day the values are saved as a snapshot, which builds the value history and charts.
• — Demand, stability, tier and rarity add context that a single number cannot give you.

Why two sources instead of one

There is no official price list for Murder Mystery 2. Values are community estimates made by value teams who watch what items actually trade for. Two respected lists often agree, but not always: one team may react faster to a price drop, or rate the demand for a newer item differently.

If you only look at one list, you never see that disagreement. RBLXValue shows both values next to each other and puts its estimate in the middle. When the sources are close, you can trade on the estimate with confidence. When they are far apart, that is a signal in itself: the market has not settled on a price yet.

How the estimate is calculated

Every 12 hours RBLXValue collects the current value of each item from both sources. The estimated value is the average of the two, rounded to a whole number:

For example: if MM2Values lists an item at 230 and Supreme Values at 240, the estimate is 235. If an item is only listed by one source, RBLXValue uses that value, so the item still has a usable estimate.

The same estimate is used everywhere on the site, in the trade calculator, inventory totals, set values, the Discord bot and the public API, so the numbers always match.

Value history

Since 21 July 2026 RBLXValue has saved a daily snapshot of every item. The value history pages turn those snapshots into a chart, a day-by-day log and an automatic analysis: the highest and lowest recorded value, the change over 7 and 30 days, and how often the value moves at all.

History is the best answer to "is this a good time to buy?". An item that has dropped 30% in a month is a different trade from one that has not moved in a hundred days, even if both show the same value today.

Demand, stability, tier and rarity

Demand (0–10)

How easy it is to find someone who wants the item. High demand items are easier to trade away; a low demand item can be worth a lot on paper but take a long time to sell.

Stability

Stable: trades close to its value. Underpaid: usually trades for less than its listed value. Overpaid for: people pay more than its value. Fluctuating: the price is moving. Untradeable: the item cannot be traded at all.

Tier

A value band from Tier 1 (base godlies) to Tier 11 (developer-only items). It tells you at a glance which items are in the same league. The full table is on the tier & rarity page.

Rarity

How many copies exist. Rarity and value are related but not the same: a rare item with little demand can still be worth less than a common item everyone wants.

Using values in a trade

1. Add both sides to the trade calculator and compare the totals.
2. Check demand: giving high demand items for low demand items usually needs an overpay in your favour.
3. Check stability: an "underpaid" item is worth less in practice than its number suggests.
4. Look at the source values: a big gap between MM2Values and Supreme Values means the price is uncertain.
5. Open the value history for expensive items to see whether the value is rising, falling or flat.

Limits of the data

Values are estimates, not guaranteed prices. They follow the market with a delay of up to 12 hours, and a value team can be wrong. Very rare items (trophies, top 100 rewards, developer items) trade so rarely that any number is a rough guide at best. Always use your own judgment, and never trade outside the game or for real money.

See a value that looks wrong, or a bug? Let us know through the contact page or the Discord server. More questions are answered in the FAQ.