I know that they were selling during late 90s/early 2000s.
I remember we had a store called Bud's Outlet - which was basically a discount store that Walmart owned. They had a lot of ads during that time with these in them.
I'd say the MVPs are fairly rare, because I usually see more of the Featherlights, and even the older early 90s soft and hard case DDs, than I do these.
There was a model or two also that had a retractable cord, variable speed, and a drawer that stored extra belts and bulbs. I wouldn't mind finding one of those for sure.