Hmm I don’t know about rare, but I have a few from that period I’m after.
The Dirt Devil Ultra MVP in general, but especially the variable speed model with cord rewind and storage drawer with extra belts and headlight bulbs.
The Hoover Windtunnel 2 bagged, so bulky and quirky, but it looks cool!
Eureka Excalibur upright.
Bissell Plus (I did find one of these).
Kenmore Progressive Direct Drive uprights with Inteli-Clean, very nice and unique machines with their features. (I have a bagged and the bagless model of these).
Also the cute little Dirt Devil Broom Vac, I have found a few in thrifts, but we’re more than I thought they were worth to me.