There is a play being executed especially on EX era reverses but really just on a lot of low pop English cards, people will send them to ZandG or list them on eBay and buy them themselves, eat the fees, and then try to use the sale as a “comp” to quote to repack buyers at card shows. Repacks are absolutely massive right now and many of the buyers will clean out entire vendors for PSA cards.
Most of these repack buyers go off a percent of CL comps because (a) that’s what the repack value disclosure/tiers go off of and (b) they’re not very smart. So if you can get CL to say your Hitmontop reverse is 5.8k card then clear 85% from a repack buyer for just $290 in ZandG fees, you’re golden.