Well, you know, I was going to suggest you purchase tickets straight from the venue's website, but I soon discovered that there is none, or at least I can't find it by specifically searching for "Shanghai International Gymnastics Center" on Google.

I -can- tell you, however, that the site (vamps2010.cn) is probably a fan site (not the best place to buy tickets from). For one, VAMPS tour websites (such as http://www.vampsliveusa.com/ ) are usually very simple, not too flash oriented. Furthermore, the opening flash uses SEX BLOOD ROCK N' ROLL instead of the instrumental version found when the VAMPS world tour was first unveiled. But the biggest giveaway is the fact that the video on the front page links to what is obviously a fan video (either that or the Chinese promoter for VAMPS is not very professional).

Like cathb said, the domain has changed numerous times over a span of a time that usually covers a little over one domain registration plan (depending on the kind of deal you get; most basic top level domain plans are given a five year registration with optional renewal). That's not exactly a good sign.

Again previously stated, the ticket prices themselves seem a dead giveaway. For one, there's TWO shows, which means the supply does not equal such an enormous ticket price. If there were just one show, it would still be ridiculous but it would make a little more sense. Even then, the ticket prices are more expensive than in Japan, where the demand is at its highest.

If I were you, I don't think I'd trust ordering tickets from this site. Even if the tickets turn out to somehow be legit, you still paid way too much for them.