[SOLVED] What do you think is a fair price (USD) for this custom built PC?

Asrock Z77 Extreme4: $128.00
Cooler Master MasterBox Lite 5: $70.00
Intel Core i7-3770K: $175.00
Zotac Nvidia GTX 1080 Ti Mini: $600.00
Corsair Vengeance Pro 4x8GB [32GB]: $180.00
Samsung 860 Evo 250 GB: $45.00
Seagate Barracuda 1TB 7200RPM HDD: $30.00
EVGA 750 P2 SuperNOVA: $120.00
Cooler Master Hyper 212 EVO: $20

Listed next to each part is the lowest amount I found for each part on eBay (that wasn't from China or modified). Based on the current pricing of components, it should come out to $1378 in parts alone.

The processor is stable and runs cool at 4.6GHz
The memory is stable at 2133 MHz (DDR3)

Both I left overnight on Prime95. CPU maxed out at 80C.
 
Solution
I'm surprised there's that much of a difference. Still a second hand system with a 7 year old CPU, with memory that I can't move to a new platform and for most people there's too much of, all of that does not scream >$1000 when for a $1000 I could make a ryzen system, new that outperforms it, then add a secondhand GPU on top. Whole system I'm not changing my mind, as parts that's far more likely to give you more value.
I'm surprised there's that much of a difference. Still a second hand system with a 7 year old CPU, with memory that I can't move to a new platform and for most people there's too much of, all of that does not scream >$1000 when for a $1000 I could make a ryzen system, new that outperforms it, then add a secondhand GPU on top. Whole system I'm not changing my mind, as parts that's far more likely to give you more value.
 
Solution