Is this ebay seller legit?

I’ve been looking to buy a simple omega quartz for a while and i always keep seeing listings from seller “engagerose” pop up. This person seems to be selling a lot of similar omegas which makes me suspicious that these are either fakes or Frankenstein watches. He constantly has a couple in auction. These do always reach around the 500 euro mark and the seller does have a 100% positive rating from over 350 reviews, sure there must be a couple who would’ve spotted this by now. What do you guys think, should i go for one or not?