If not in a hurry, maybe run two auctions... one with the scope... and one afterwards without.
Sometimes it is very nice to get a G2G package... especially when the glass is top shelf.
My CZ550 (9,3 Mauser) comes to mind... she is set-up and G2G with a nice Kahles
If no takers for fair money, strip her down and sell separate.
That kinda thing.