This isn't much, but here's a brief thread.
George Herman Stradivarius copy
Unfortunately... your description covers a pretty broad swath of basses. In other words, it could be a great bass or a dog house. Also, there are a lot of odd brands, for instance "house brands" of shops that import basses from overseas. This isn't necessarily a bad sign.
Does the shop deal primarily in basses? If it's a reputable bass luthier's shop, that's a good sign. If not, you'd be well served to find a player or teacher who could evaluate the bass for you.