Im currently on the prowl for my first actual big boy amp. I'm most likely sticking with a combo amp. My friend offered me his Randall 100w valve dynamic combo for a mean price. He's had it for five years or something. But i dont really know that much about amps. 5 years seems a while, is it likely that the randall would crap out on me anytime soon, if i were to buy it?
Well you should know that that combo is actually a hybrid amp and not a full tube / valve amp.

And as long as it's bin taken care of well, it should last longer, as amps usually don't blow out unless they're made of really crappy parts. Like Spiders.