firstly, let me just say that I'm sure there will be some eye rolls and disagreements about my recommendations, but considering you're probably not that interested in becoming a connoisseur, you're like 15 and aren't going to drop $200...
hey, at least around Toronto there's a bunch of Shoppers Drug Mart locations selling various 30-50ml bottles for about $20. Pick up a Cool Water or Polo Sport. It's pretty young, clean, cheap, and girls generally like it, etc. I jsut got a 40ml for $20 from shoppers and you can probably get them even cheaper online. The buy and sell on basenotes you'll probably find some cool water bottles.
I'm just not too sure if it's too old for you but Guerlain's Vetiver is about $50 for a 125ml. It's a soapy green fresh scent, really nice, and a lot more sophisticated then some other ones. Otherwise something like Mugler Cologne or Prada Amber are both clean soapy or floral things.
Online you can get YSL Live Jazz for about $20 for a 125ml and that's a nice all rounder spring summer cologne.
other ideas might be something like Aqua Di Gio, or D&G Pour Homme (or light blue). that's all I can think of right now. These are all pretty generic and not overly complex but they're all easily available, quite cheap, and girls generally like them.