BTW, i've been trying to sell this 80GH rig, and cant even get $600 for it. That's about my bottom line price, since that is the amount it would take to get another antminer s1 sent my way. lol. worse depreciation than a new car.
SHA-256 miner depreciation is crazy.
If you want to avoid that, GPU mining depreciation isn't that bad at all, in fact, the price sometimes appreciates. That's because they are dual purpose, a lot of gamers would be happy to buy a used high end graphics card.
I usually just do GPU mining. Unfortunately my first foray into ASIC mining was AMT. What a bad mistake.