curiosity question on flipping

[theshleps]

I am a collector. I do not purchase with the intent of flipping tho sometimes I buy to upgrade and then sell the lesser conditioned one.
So often I have sold a card (so I can upgrade) with a major auction house like REA, LOTG , others only to see the card then pop up a few weeks later on ebay and being sold as a BIN for at least 2-3x the price. For instance I sold this card thru REA recently (hammer price 2,200) https://www.ebay.com/itm/12711657623...Bk9SR8qt977bZQ
So asking almost 5x.
I hate when I get outbid by 1 bid for something I need for my collection and then the same thing happens. It appears on ebay for too high a price for me to pay. My question is do you think these folks are getting at or near the prices they are asking. I am not going to turn into a flipper but do you think that ebay yields higher prices than major auction houses? Also does this piss you off like it can me or is it just part of the game?