ebay and paypal ends up being about 13% of fees. Shipping a PC is also problematic. The graphics card should not be "free floating". Also, shipping will probably be $40-60. So you spend $380 on a computer, you have to add $60 to that, and then another 13%. That's about $500. You would have to sell this computer for about $500 (without windows 10 mind you) to even break even. So then, you have to factor in your time, profits, and whatnot. What if a part breaks?
So let's say a safe price for YOU would be $600.
Who would want to buy this????
No one
It doesn't come with a mouse, keyboard, monitor, or warranty! No one would pay $600 for that awful computer.