[kev009]

Set up an eBay saved search, they are the most common of the MCA RS/6000s to show up. Price target $150-200. If that doesn't work out in a reasonable timeframe (say 1 year) contact me.. otherwise better to rescue from the market than other collectors, dollar for dollar, to keep more machines out of the landfill.

There is a 220, which have the interesting RSC chip (good for AIX 3.2.5, probably not a good target for anything else including NetBSD due to specialized CPU support that would be necessary): https://www.ebay.com/itm/335464230008

You'd want a [250,25T,25W] (66 or 80mhz, hard to determine which without seeing the planar) for NetBSD or AIX up to 4.3.3 (5.1 will run but is a little heavy for the hardware).

There is a now rare 7248, this is a second gen prep system that is special because it can boot Solaris, OS/2, NT, AIX, NetBSD. It looks similar to the more ubiquitous 7043-140 which is also a good machine but can't do all those OSes. Price is close to reasonable for what it is: https://www.ebay.com/itm/186792645248