OK, I've got three workstations running Win98SE that are not connected to the net. I like them because I have many old programs I use and I enjoy themes and other things to tweak the interface.
I have one dead XP machine. It is a 3.1 gighz Pentium Laptop from the sleazy Gateway company. It is silent, non-energy consuming brick. It went in for repairs to Gateway 3 times in one year for the same problem, no display. When I tried to have them fix it again they said it was month 14 and I no longer had a guarantee. I wrote their CEO certified mail and he agreed. So I have a Gateway brick that does nothing.
I'll have to look for about 3 copies of XP OEMs, because I'll stay with the OS for a long time. Since none of my apps would benefit from 64 bit processing, I think I'll look for WINXP, 32 bit Pro. It appears as though they (OEM) will disappear in January, if my reading was correct.