Assertion: asset's value | /r/CapableOf | use previous sales data
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text: There is no central exchange pegging the value of a first edition of "The Amazing Spider-Man" or a mint-condition Honus Wagner trading card on a daily basis, so the value of your collectibles will have to be guesstimated using trade publications and previous sales data—and even then, the market can swing wildly if a collectible is found to be less rare than originally thought.