$350 - $450 for a mechanically sound but externally rusty Highway Patrolman?
Do, oh DO sell me YOURS!
You ain't gonna see ANYthing like those prices on them in SE/E WI.
AND, they sell at those (higher) prices. I walked by a 28 offered at $750 at a gunshow a couple months ago. Average finish condition. When I came back around, thinking I'd offer the seller $500, it was gone.
Further, considering what a FINE gun the 28 is, $750 really isn't a bad price. Just look at the price on any newer equivalent revolver.