I let my rear rotor go as well, to 124,000, it was pretty thin. Same deal, got a working pull from ebay and back in business.
Good advice on thickness, but I completely disagree regarding chinese brake pads. I've been running Volar, Sixity, Catric organic pads on my bike for over 120k miles and have never had an issue with them. If you've had a different experience I'd love to hear it, otherwise I think paying four times as much is foolish. The only thing I've found that really matters is keeping the sliding parts greased.