Look for sellers that offer escrow. Escrow guarantees your shipment and the quality of the goods when they arrive. If everything doesn't go well with the shipment you are guaranteed your money back.
Yes this...you took the words right out of my mouth (err keyboard) lol
Also make sure in the future to always use sellers that take paypal. NEVER NEVER do wire transfers. If you read some posts on here you will see that 99% that have used them got ripped off.
You can also do a post asking if anyone has ever used this seller or company name. They can let you know how their exp. with them was good or bad.
Hope this helps. Good luck and Happy Sales!