3 screw "Magnum Only" rimfire prices?

Ran into an interesting old Single Six today, a "magnum" marked .22 Mag RF with SN 304***. Revolver was in decent shape, probably around 85% with no box. I tried searching, but what is the going rate right now for these guns?

I did find this article...https://gunblast.com/Hamm_MagnumOnly_SingleSix.htm

There are a few things that could make a little difference. Grip frame type, (XR3 vs. XR3-RED, Eagle marked barrel or not,, was it shipped as a convertible,, even if marked "Magnum," etc.)
HOWEVER,, a 85% gun is a strictly a shooter grade,,, & unless a person didn't have a variation in their collection, this one would work until a better condition one came along.
At best,, maybe $275-$300 for an 85% gun.

Single Six Magnum with Varnished Walnut grips and Box may be around 500. imo