#1
Im a guitarist/singer looking at two possible portable recorders. Im looking for something that will record a clean/acoustic guitar and my vocals together well, under 50$. Here are two of my choices:

http://www.guitarcenter.com/RCA-VR5230-1-GB-Digital-Voice-Recorder-889844-i1475166.gc


or


http://www.guitarcenter.com/Sony-ICD-BX700-Digital-Recorder-620012-i1449069.gc

Thanks for looking!
#2
For something well able to record music and vocals, you'll need a more substantial unit, and that is going to cost a lot more than $50.00. I wouldn't go with anything less than something like this:
http://www.guitarcenter.com/Tascam-DR07-Handheld-Digital-Recorder-105186159-i1435340.gc

And ideally, you'll have to go a lot better than that. If you want a quality recording, you're going to have to pay for quality gear.