Pair of 1080TI rigs, built by VoskCoin and Remote Mine, respectively.

Six cards in all; used only half a year.  (See update, below.)

2 BTC for the lot.  (See update, below.)

Pick up in Salt Lake, or pay for shipping.

Further details and discussion:
https://bitcointalk.org/index.php?topic=5109633.msg49748627#msg49748627
https://bitcointalk.org/index.php?topic=5109633.msg49885514#msg49885514

2019-04-17 update

Finally got someone else to store the rigs, and take some photos.  (Should I get pictures of the boxes, too?)

I was mistaken about the number of cards -- the total is eight, not six.  Six in a single rig (that pictured), and two in another (not shown).  I had thought that such was the case, but didn't want to mistakenly false-advertise, before.

Since the initial post, the BTC exchange rate has shifted significantly, so the previous highball of 2 BTC is now excessive.  "Buy it now" price of 1.3 BTC (~$6,800) for both rigs, or we can haggle about individual parts via PM.

First rig...
[6] GIGABYTE GeForce GTX 1080 Ti Gaming OC 11G graphics cards (gigabyte.com/Graphics-Card/GV-N108TGAMING-OC-11GD)
[1] EVGA SuperNOVA 750 P2, 80+ PLATINUM 750W power supply (evga.com/products/product.aspx?pn=220-p2-0750-x1)
[1] Hewlett Packard 1200-Watt power supply (#438203-001)
[1] open frame with motherboard, processor, memory, etc.

Second rig...
Not sure yet.  Awaiting further photos.

Images of rig, with closeups of part numbers, along with recent periodicals...
https://imgur.com/lYCZ8Si
https://imgur.com/haJTJ1t
https://imgur.com/6BeHrgg
https://imgur.com/BPslnuG
https://imgur.com/h95pgSD