Oakland Raiders jersey for my boyfriend?

my boyfriends favorite team is the oakland raiders. He wants a Tatum jersey for Christmas. i found one at the mall and it is the last one, so they put it on hold for me until tomorrow. only problem is, it is $125. i dont think i can afford that. One of my pay checks is about that much. he said he would pay $50 worth but would it be wrong of me to have him pay for part of his present? are their cheaper jerseys online?