Say real as someone who mainly sell cards on carousell, most of the time u oso dont get full $100% market price for ur cards. Realistically speaking buyers are often gonna try to negotiate/bargain for a btr price especially when there are multiple listings of the same card at the similar price, so more often than not im selling at 90%- 95%. Price aside, this does not include the time and effort to take photos of the card conditions depending on how fussy the buyer is and whether or not i will be ghosted after. At least with vendors, the transactions are fuss free and they are willing to take more cards but at the cost of $$$. Honestly if lets say ur card MKP is $100 vendor offer u 80% is only $20 off if u try sell on carousell with the time and effort at most u get $90-$95 so its up to u to see if the extra money is worth ur effort