Ok I got a HP EliteDesk 8000 SFF i7-4790 3.6Ghz, 8MB for $155 (with tax $165)
I has a 500 GB HDD and Windows Pro, not sure if it's 8 or 10 but not either the OS or HD really matter much.
HP EliteDesk 800 G1 Small Form Factor (500GB, Intel Core i7-4790, 3.6GHz, 8GB) | eBay
I bought it...