Prophet River is currently selling brand new G17’s for $850. I bought a Gen5 from Al Flaherty’s for a shade over $900 taxes & shipping included in the past week.
As long as retailers are selling for $900 the secondary market value is less. General rule, 80% if in excellent condition, decreasing rapidly from there. People can certainly ask for more, and dummies will certainly pay more. Don’t be a dummy.