Gevril Park Automatic Ref 2503
Not likely
agm3,
I am sorry that you may be unlikely to garner much response to your query about Gevril. I hope you do.
Most of the reasons are already within your post:
1) "limited-edition" of 500 pieces; the few people who buy them are unlikely to read and post here.
2) e-Bay: are they your watches for sale?
3) Starting on internet auction sites at $300; what more to say?
A separate note about "Swiss" watches:
There are many "legitimate" brand names in Switzerland that can be completely "legal". Old brand names can be bought from a registry and as long as 51% of the value incorporated into the watch is Swiss (parts or people costs), it can attain the Swiss-Made title. The value can be the wages of Swiss personnel.
Hypothetically, if I used 3rd country base components that are "finished" or assembled in Switzerland (even if 90% of the parts are made in Thailand), but I paid a Swiss employee $1,000,000 salary, it can attain Swiss-Made title. I could be that Swiss employee as long as I pay Swiss taxes 
In future, the Swiss are considering raising the bar to 80% of the value added in Switzerland.
Regards,
MTF
The brand recently underwent a corporate shuffle
I don't know where the watch you are referring to falls within that, but I do know they've attempted to push their products, pricing, and social identity upwards within the last couple years.
It's likely to use an ETA movement, such as the 2824 shown below, which I have found to be an enjoyable watch for the money. As I don't substantiate the joy of ownership based on price alone, I think it would make a fine watch and last a long while. Good luck
Thanks Dotman
The early Gevrils, like the one posted by dotman, were fairly interesting
They were decently made and were novel because the bracelets and bezels could be swapped by the owner. Then the company died and was resurrected. The current crop of Gevril watches bear the same name but don't offer any unique selling points, unlike the originals.
- SJX