Please Help Purchase Now Or In May For My B-Day? Thanks :)

I already told him about the price increase but he didn't seem to care. He would rather spend more money later and get it for me at a time that he wants, when he is not so tired stressed and more relaxed.
 
Thanks for all your opinions and advice. I talked to my dad about it and wasn't able to convince him to get it for me this weekend. :shucks: He once again said he didn't care about the price increase. So now that I have to wait till my b-day in May, I am just going to make sure that I get everything that I want and even make him feel guilty if I have to. :P