What Collector Crypt does differently
Collector Crypt tokenizes each vaulted card on Solana and pays its 85% to 93% buyback in USDC, with 3 days to decide. That suits crypto users and puts off everyone else.
Trove
Trove's homepage puts its buyback at 100% of FMV for the first minute, 93% for the next hour, then 90%. Its Terms let Trove change or withdraw any offer and require identity checks, so read the number on screen.
Underdog Rips
Each Underdog pack is tied to one authenticated card or a PSA, BGS, CGC or SGC slab. Sell-back pays 100% of the FMV shown at reveal, with 3 days to decide on most packs.
CrownCards
CrownCards sells packs of professionally graded Pokémon and sports cards from $25 to $1,000. Its FAQ mentions 100% FMV buybacks, but its terms make any offer discretionary and items can be held for up to seven days.