People are still buying miners, but not as much as before. The difficulty has gone up so much in the past month due to the influx of noob miners trying to get in on the BTC rush that ROI on mining equipment is rediculous unless purchased for cheap. Things were great even up until last month or so, but currently it’s getting harder and harder to make money off mining. Hopefully things change for the better here soon. Either way, good luck with your sales. I’m sure somebody will be interested in the coupons eventually.
Not so sure they will. The casual miners probably running their rigs at home and just see a light bump in their power bill since it's mixed in with all their ordinary power usage. If they aren't monitoring how unprofitable it is, they're likely to just keep mining and see the gross earnings. So they'll stay hashing thinking everything is hunky-dory disregarding the power consumption and the diff stays high. Honestly I thought with the heavy dips lately we'd see more discount hardware hitting the market. Not so much.