I loved building it, and love mining, but kinda thinking that with prices the way they are (gpus overpriced, coins underpriced) it might be worth it to flip it, buy some BTC/alts, wait for a pump and then sell and the buy more gpus and build another rig. Might be crazy but I see people asking insane prices for ready-built rigs on craigslist. Thoughts?
Excellent question. To answer your question, I think for a 4x 580 rig, you could get $2200. I base this on what I see on CL in the Chicago area. That's roughly $300/used card, +$500 parts +$500 building/helping someone to get it working. I haven't done any extensive study, but I am inclined to think that it varies city-to-city based on electric costs.
I've also found that right now, people seem more interested in the cards versus the rigs - if I am you, I'd consider selling the cards as a bundle only and keep the rig while you flip the GPU proceeds over to a coin or just cash. This is an eBay query for used cards that have recently sold (I did nitro 8gb):
https://www.ebay.com/sch/i.html?_from=R40&_sacat=0&LH_ItemCondition=3000&_nkw=rx%20580%20nitro%208gb&LH_Complete=1&LH_Sold=1&rt=nc&_trksid=p2045573.m1684I am not a seller there but it looks like selling on eBay costs a ton: somebody told me 13%! So if these cards are going for say $350 on average, maybe you can sell them for $300-$325 each, depending on how much of a time commitment you want to make.
I think the summer rolls around and garage miners start feeling the heat (
![Cheesy](https://bitcointalk.org/Smileys/default/cheesy.gif)
) and that's when you'll see used card prices start to come back to earth. In fact, if crypto doesn't rally HARD between now and say June, you'll start to see rigs and cards everywhere. So if you're going to sell, do so soon, so that you can be patient.
EDIT: spelling