Hands down the best sounding amp that I have ever heard.  This is a hand-wired, 80's voiced Welagen Overdrive Special similar to Robben Ford's Dumble Overdrive Special.  I specified "excellent" condition, but it could probably qualify as mint condition.  It includes a two-button foot switch and built-in powered effects loop which Jelle Welagen calls the J-Water.  This is an absolutely fantastic amp, you won't be disappointed!

More information from Jelle Welagen's website:

"The Welagen Overdrive Special is simply the ultimate small dynamic lead amp with excellent projection and tonal balance. It has both Clean and Overdrive channels. The EQ controls and switches give you a variety of tones. A tube buffered effects loop allows for seamless integration of outboard effects."