I used to run a KEH P9700R for about 11 years till the volume turned itself up to full one day and wouldnt go back down!

lol
I think the button was just stuck on internally but no amount or prodding would free it off and I thought it's about time a bought a new one!
That had almost identical features to the DEH P88RS II..
Cost me £1000 with a 12 disc changer all those years ago!!
I've been running a DEH P7700MP for the last 3 years but fancied a change....
So went with the DEH P88RS II...
Needless to say I like my Pioneer head uints!

lol