The Kabar Dozier Spearpoint is a pretty nice knife for $20!!! I bought one for my new Boy Scout son as a "loosable" locking blade knife.

But honestly, my advice is to save up some beer money and/or make a deal with your folks to combine birthday & Christmas presents and then maybe add some of your own money to get the mini-Rittergrip for EDC. It really is a FANTASTIC knife!! You won't be sorry.