The K-32's/Model 16's are my favorite revolvers, so I try to keep an eye out for them. The last couple I've seen for sale: In December a Model 16 no dash, gun only, sold on GB for $2550 (item#321512107). It had import marks on it, also a SSN and initials scratched into the butt. But back in November, a mid-50's K-32 with a couple minor flaws in a period correct gold box sat on GB for 7days with no reserve and an opening bid of $1995 (item#316308745). It ended with no takers, wasn't relisted, and the seller didn't respond to inquiries. Still can't believe I didn't act on it...
I don't see anything that makes me think the gun you're looking at has been refinished, but is that freckling on the sideplate? Maybe it's just my computer screen. Depending on actual condition, I agree with David Wilson that anything under $2500 is probably a good price, and anything over that is based on how bad you want one...