I've just found this great handmade cigar box guitar on ETSY. The best part about this guitar is that it includes an electric pickup which has volume and tone control, this means you can make some serous noise when hooked up to an amp.

From kwithrow's ETSY page:

Here we have an awesome, handmade 4-string fretted cigar box guitar. It sounds and plays as brilliantly as it looks. I have made hundreds of similar instruments and play them almost exclusively. This one has a particularly nice, full tone with plugged in and excellent action to allow for play with or without a slide. Additionally, it sounds great all the way up the neck.

Link