I can't be the only member who flashed to this thread when they saw the price:
Some Type Of Hand Ejector...What is it?
Sundance was part of the "Ring of Fire" gunmakers down in Southern California. A handful of companies, mostly related, putting out guns for po folks, what The State called Saturday Night Specials. The politicians, smelling a few leftist votes, regulated them out of business a long time ago.
I think the widely varied opinions on their reliability may come from different calibers. Back in the day somebody told me that the .25s tended to run okay, but the various models in .22LR didn't.
I remember one match where there was a couple of these guns (Ravens, IIRC) on the prize table, and people were walking past them to pick up ammo, knives, etc! I don't think they started to go until the second round.