Bitmain just updated their pricing with the reconfigured S7-LN PSU included.
https://enshop.bitmain.com/productDetail.htm?pid=00020160527114935137wr0xd6U006A9You can't line these things up side by side for comparison because the LN is only 2 hash boards. You can easily work out the $/TH and scale it up to 4.66 for comparison though.
If you do that 4.66 TH with PSU is valued from Bitmain at $480. Using the same ratio of unit and PSU cost you get the following.
New:
S7 = $366
PS = $114
Now considering PSUs are basically worthless used... You can buy a used 1200W hp for $30 on eBay. Not an auction either, full time eBay store with 100s available. Now consider eBay is naturally overpriced and $30 for PSU with VGA cables sounds reasonable.
http://www.ebay.com/itm/HP-DL580G5-437572-B21-441830-001-438202-002-800-1200W-AC-Power-Supply-/161940249325?hash=item25b4641aed:g:ZZUAAOSwwPhWjt1tUsed:
S7: $295
PS: $30
I was expecting $325/bundle ($300 if purchasing all of them). Suddenly $295 (with brand new at $366) doesn't sound nearly as crazy.
This is looking at real low ball performance out of the LN model too. It appears to be 2 of the 45 chip hash boards. Clocked at 700M I would expect to see 2/3 of batch 17 performance, or 3.15TH/s. Using those numbers scaled to 4.66TH/s you only get a total value from Bitmain of $415 with PSU, not $480. The above was all done assuming the low rated performance of 2.7TH/s (as opposed to expected 3.15TH/s) as that's how it's currently listed.
If it turns out the LN performs at 3.15TH/s and you scale to 4.66TH/s you get:
New:
S7 = $315
PS = $100
Now my proposed fair pricing looks like a steal for the seller. Offloading for $20 less than manufacturer...
Used:
S7: $295
PS: $30