Is there a way to check if somebody bought an item off the market or unboxed it?

[MorningStar]

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[ho chi minh gaming!!]

no

[WinnieDaPooh]

There are sites like csgozone that show if it came from case opening or a trade up contract. Or you can try csgoexchange that can show you the items history of previous owners, it also shows if it's been duped.

Edit: but there no sites I know of that shows if it's been purchased from the market recently.