Although I do not specifically hunt them down, I have a couple Reginas, but nothing too spectacular. Just the bagless Quickbroom (the last model made), and a Dirt Magnet hand vac.
I seen a Housekeeper on eBay for months before I got serious into collecting but by the time I went to buy it after several months, it was sold.
Also seen a steamer carpet cleaner at Goodwill but didn't buy it.
They are hard to find - I don't see them much at all.