Tracfone has iPhone 6 32GB (Grey or Gold) Gold OOS for $59.99 - $15 (with code 60274) = $44.99 + tax now. Plan is not required and shipping is free.
I know the iPhone 6 is already a pretty old phone by now, but for $45 I think it is a ok deal depending on what you are planning to use it for (especially since the phone is new, not reconditioned). For light user, it is not a bad idea to combine this deal with the $40 Tracfone 1 year plan.
Note: Phone is locked to Tracfone, and 12 months of service is required before it can be unlocked.