Found a fairly decent Model 4506-1 in a shop today in my travels. Unfortunately, the shop is not in Massachusetts... meaning significant extra expense and complexity if I decide I want it.

It was a Model 4506-1 (R4) dash 3 with 2-line laser etched slide markings. 2 old yellow follower magazines, no box or papers. Last one I found like it was in pretty tough shape but this one was acceptable albeit far from pristine perfect.

If it were in-state, I probably would have swallowed hard and bought it... putting myself so far down into debt after last week's truck tranny bill that I better start looking for a part-time job or a bankruptcy attorney.