yeah it may be "fair" in your book im just saying that it will not sell for that price, good luck!
the fact that you paid 4 grand however long ago means nothing, people looking for 990X level of performance are likely dropping money on an SB-E or IB chip..
you probably be much better off parting it off being that the cpu and gpu alone will bring good money...
however, 1800 for the package i def do not see it, maybe 1200 at best
the bottom line is that people on here know their stuff and will not overpay and therefore there are slim margins for profit.