I understand ive sold things for just as much. Some things have nothing to do with the seller and the item itself that will bring what it's market value is correct. I'll use the seller "afrasitas" as an example. His pictures are very basic along with the description but it doesn't matter because the item is what is bringing the value. The 15 to 20% is a huge consideration when where talking easily over 100k in profit in stuff from hoarding. Now you can't tell me if the same types of items hitting the auction Block 50% of us don't have them saved in there search list let alone everybody else and they will be seen by potential buyers. Another key aspect is they said they would use data to factor there pricing so does this mean there using yours and others pricing to determine there prices.
I'm just saying sometimes i think it has nothing do with who is selling it sometimes. Seasons , style changes "ie" pleated to flat front pants I know I had a hard time dumping suits as soon as everybody switched rapidly. I know what you are saying I've flipped plenty of stuff off of linda alone just from her people being careless. The caraceni overcoat I bought last year from her for 250 I wore for the winter and sold it for 1500 to a guy in Switzerland two months ago. Or the borrelli vest she just sold me for 30 cause she hadn't looked in the pocket for the tag. This is where having the correct person doing it plays a huge factor.