They stock authentic Japanese TCG products no fakes, no shady sellers, just the real deal
More experienced players will find success in custom deck building, carefully balancing Energy types with Pokmon attack costs and incorporating Trainer cards for strategic advantage
Currently the most valuable gold cards are the Gold Star series from this generation of Pokmon
For individual cards and older booster packs and boxes, you will just have to gain a lot of experience and learn the nuances of real Pokemon products and then make educated purchases, ideally with a means of recourse if it turns out you were scammed (some kind of buyer protection program, etc)
2013-06-07 If you cant cast the card, perhaps because there are no legal targets available, it remains exiled with no time counters on it, and its no longer suspended