The first is a fairly well-established dealer TimepieceVintageUK who from memory, best I can tell, started dabbling in Seiko 7A38's middle of last year. Their normal stock in trade seems to be vintage Omega Seamasters, TAG Heuer, etc.
They appear to be opportunist re-sellers. Their photographs are harshly overlit (presumably to help hiding flaws) and their descriptions are frankly O.T.T. and could possibly be AI generated. They currently have four 7A38's listed.
- Ebay-Seiko7A38-TimepieceVintageUK-Summary-x4.jpg (152.03 KiB) Viewed 185 times
The 7A38-6060, asking a ludicrous £1299 and two-tone 7A38-7020 (far right) asking a laughable £499 were both listed on 24th February, so eminently traceable. The other two date back to July and September last year, so won't be easy.
The 7A38-6060, which is in almost mint condition (save for the unfortunate choice aftermarket strap) was first listed by Egyptian eBay seller oldtimemarket1 in the last week of January, initially asking a laughable £950. They subsequently re-listed it, increasing that to £999, then ended that re-listing (item # 126926818566) on 13th February, because of an alleged error in the listing. Presumably TimepieceVintageUK made them a lower offer outside eBay. In case you don't understand what I mean by 'harshly overlit photos', I suggest you compare their eBay images with those of the previous Egyptian seller's. The watch looked much better in their listings.
Although far more common, the two-tone 7A38-7020 was quite easy to track down. Not by its case-back serial number, but from the ingrained dirt in the bezel's dummy rivets, which TimepieceVintageUK hasn't bothered to clean out either. It was first listed at the beginning of November by a Scottish eBay seller artist_watch_lover, who was initially asking a laughable £450. He re-listed it weekly a total of 20 times, gradually reducing the opening bid price, before it finally sold on 13th February as a Buy-it-Now for £250 (item # 306109971146). How does TimepieceVintageUK justify asking nearly double the price ?