Hi and welcome!
Your pearls look just like my large fresh water pearls, including the slight pink overtone. I paid $200 for the pearls themselves in wholesale, unstrung and without clasp.
It is true that there are reputable sellers but they are few and far between. Sven,who has been commenting, is one of them, but if you compare his prices and those of other on-line sellers plus
http://www.tahitianpearls.biz/, with what you paid for the strand, you'll get an idea if it was too good to be true. These on-line sellers also have really good pictures you can use to compare with your own.
If you paid with PayPal you have 45 days from the time of purchase to file a case. First step, of course, would be to contact the seller. I'm happy with my FW klonks, by the way, having now restrung them to a short choker using an arts and craft copper clasp
- Kari