I have an ungigged Marshall SLX 100 valve head which i'm looking to part-ex for something a little more to my tastes. Don't get me wrong, it's an awesome amp but i'm leaning towards a twin channel (DSL or similar). It's about 10 years old and in mint condition.
I've tried to research the amp for it's current value to no avail. Does anyone have an idea of its worth so i'm not likely to get ripped off.