I'm looking at a miner its used and a couple years old but I'm only considering it because I have free electricity. What do you guys think its worth?
6 gpus sapphire dual x r9 270x
Asrock H81 pro btc mother board.
(Industry standard)
3.0 USB pcie powered risers
2 psu
Corsair 850
Corsair 750m
Sata lll SSD
Ram
Intel CPU
As the above poster said, 270x GPUs are old. (Although, I'm still mining on HD 7700 and 7800 series cards.) The R9 270x cards were also still mid-range cards, even at the time they were released. (Supposed to be at the lower end of the R9 2xx line, above the R7 2xx).
If you're planning on mining Ethereum, be careful about how much graphics RAM those cards have. If they're the 2GB version, there's a good chance that mining ETH will not be a good option due to the DAG size. Other cryptocurrencies are still an option.
At this point, I would not buy it (period), and would not value it over $800. Keep in mind this is kind of a guessing game. No pictures, many details missing (What RAM? What SSD? What Intel CPU? Is a frame included? Will you be picking it up in-person or will it be shipped to you in pieces, as a kit?)