I think it's safe to say this site is selling fakes. Someone who bought a jersey there said it was though he thought the quality was very good. Here's a little comparison I made:

This is what an the back of authentic LaDaninian Tomlinson jersey should look like:



and this is one on Jersey 101:

Nice compariosn JJ. You can tell the quality of the fake is that much poorer. I believe they are based in Hong Kong, which is never a good sign.

You've converted me into a strong supporter of the genuine NFL jersey. I thought I should also add that this Eli Manning jersey from the same site is really extracting the urine:

How poor is that. Horrible stuff.