well if it works when you get it you could put some fans in it and that's supposed to help.
the problems it gets are usually only cracked solder joints and the rectifier bridge - both of which are very easy to fix because it's all single board.
so if you can get one for a good price it is a really nice sounding amp because you can crank up the master volume but have the channel volume low so you get good sounds at low volumes
but NEVER get a TSL122 because if that breaks (and it probably will) you have no hope in hell of fixing one of those
www.paulinthelab.com - Stripboard Layouts