Gregg and Roger,
Both of your machines (Gregg's 980 Electro-Hygiene and Roger's 888 Royal) are mid 70's models. And although I used to sell Electro-Hygiene, Gregg's is the FIRST 980 I've ever seen! When I went back to work for Electro-Hygiene in 1976, we were selling a machine called the GALAXIE PRESTIGE model 990, which was a carbon copy of Roger's 888, except the blue bag had red printing instead of dark blue, and said Galaxie Prestige instead of Royal Prestige. It was a new model at the time. We didn't have the EH 980 at our store, but obviously they were available then, or maybe a year or 2 later.
But all 3 were top of the line at the time, and if I remember right, the Galaxie, complete with attachments, sprayer, and accessories to convert it to a portable, went for $389.95. I wish I would have bought one back then, but I do have the sales manual for it.
Jeff