I was just in China this week for business and went shopping at the Lu-ho mall which is the knock off specialty mall near Hong Kong rail station. I went in to a place where a guy was selling "authentic" jersey's including #30 but it was the St.Louis Rams version game version (supposedly) with stitched on letters and numbers. He wanted $40 for it.... I didn't know enough about the different types to bother getting one even though it looked real enough.
When a guy can sell a jersey for so cheap...it makes you wonder how much money teams make from the sale of the legit ones.....