I have a first version Line 6 BackTrack digital recorder. The new model has a built in mic, but this one does not have a mic. I have a very limited (ie, nada!) budget, so any recommendations for a low cost mic would be appreciated. Nothing fancy recording wise with this one....I just want to use it as a scratch pad to capture ideas with voice and acoustic guitar. Of course, I'd like it to sound half way decent, but the main criteria is price. Probably a stupid question, but is there anything out there in the $20 to $30 range that would work? I've hit the local Goodwill, thrift shops and pawn shops hoping to find something as a stop gap, but no luck at this time. Again, any rec's or opinions appreciated. Thanks!