Although you didnt mention what is actually wrong with it, I would guess its dirty faders and switches. It is really up to you, but if you have any experience at all with electronics (soldering and the like), its not that hard to replace these yourself. Maybe you should get a new mixer, and then open up the PMC 25, take a look around, and take a whack at trying to fix it yourself. If it doesnt work, oh well, but if it does, you've learned a few things, and you've got yourself a spare mixer 'round.