What instrument should I play?

I'm 14 and have had a little bit of music experience, but my friend plays guitar, so if I need a refresher, I'm assuming I could ask her. I'd like to learn something different or sad sounding (because I'm cool like that). I live in a small town, so lessons might be a little hard to come by. In terms of money something under 250 would probably be good. I was thinking of the ukulele, accordion, violin, or flute. THANKS!!! :D