(Oops! I posted this originally to the "old S70" forum. I'm reposting here, where it belongs, although the same caveat applies to S70s.)
I just replaced two failing remotes for our '97 850. I was shocked to learn that they cost $106.50 each! Volvo's markup on these silly little things must be 300 bazillion percent. Outrageous! Even the dealer agrees with me. Originally, the problem was diagnosed as a failed "lock relay." But when the dealer replaced the part, the remotes still didn't work. They went ahead and programmed two new remotes for me, without asking first. If I'd been consulted, I think I would have said "fuhgeddaboutdit." Which is what I'll do the next time these little buggers fail.