I have two authentic jerseys I bought (one home and one throwback retro) and one replica jersey given to me as a perk for going to my team's very first game... plus (technically) a practice jersey that was stolen at a game when I changed to the new jersey I bought that day.

The practice one was cheap, like $35 or something. The perk one was kind of free but not really, since I had to pay for tickets plus travel to go to the game away. The other two were both ridiculously expensive for a shirt.