Bought a guitar at a local department store for a hundred bucks a few years back and donated it to the lady who cleans the boats upon return. It sounded and played like a $100 guitar, ie most definitely NOT a Martin but it got the job done.

We asked the folks at the VIP arrivals where to find a guitar, and they gave us a list of a few potential small electronics/hardware/department stores in the RT area. We had to go to a three or four places before we found it, I suspect it isn't the kind of thing normally carried in inventory so there's no real certainty you will be able to find one!