For one build, I was planning on using the following:
Gigabyte 990FXA UD5 motherboard
Lepa 80 Gold Certififed 1600W power supply
AMD FX-8320 Vishera CPU (For quarkcoin/etc. CPU mining)
and 5X Gigabyte 280X tricooler cards.
I suppose I could certainly lower the prices, but I was aiming for more of a quality build than a cheap cpu like you mentioned. Knowing this, would roughly 3K still seem fair to you, or too low?
Oh. I wasn't even thinking about CPU mining. That changes the price a little.
Well mobo adds another $30 to cost, PSU subtracts roughly $60 (Can 1 1600w PSU handle all this equipment though?), CPU add about $120.
So equipment cost would be closer to $2800.
It all depends on how much you want to be paid for your work and how fast you think you could get your hands on the equipment. I could see this sell on here for 3K, maybe a bit more, and definitely more than 3K on Ebay.
Again - Just my opinion. People are unpredictable, so you never really know how much they would be willing to pay.
(Especially right now with the shortage of GPUs. If you could get this equipment and be ready to ship within a few days, I think you could make a pretty decent profit)