It was actually next to top of the Haro range (and the top one had the same frame) in 1991 so you could argue its not a budget bike. They did a load of other more conventional framed bikes lower down but still with the distinctive top tube.
Glad you like it anyway. Probably going to get a DX short cage rear mech on it when I find one (or a XT - even better) but it works like a dream at the moment.