How much should I sell my old pc for to pay for my new monitor? How much would people accept?

The specs are 2070 Rtx Super, Intel I7 10700k. etc I Forget the rest. It’s a pc i bought from IBUY power and i had it for 4 years and i replaced it with a new one last February
How much should I sell my old pc for to pay for my new monitor? How much would people accept?
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