First off, eBay is the Wild West. There are good sellers, and there are snake oil con men and scammers. They come from every country, not just the old Communist Bloc nations and the surrounding area. Poland isn't a hot spot that stands out though.
Second, that's a caliber 508, which is a rebadged Record 195x series. Longines acquired Record in 1961, so technically it's an in-house caliber but not in the strictest sense. Since collectors value true in-house calibers, the 50x series isn't in as much demand nor does it fetch big bucks like an in-house movement or even some of the other earlier rebadged Longines movements.
Third, the opening bid is about the maximum I'd want to pay for it, and that's if I had a few glasses of an adult beverage while surfing eBay and found nothing else of interest.
If you really like that modern tribute watch, look for Longines' from the 70's that have the in-house caliber 890 or 990 series. They look MUCH more like that design and can be found for $500 or less.
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