Ha. Yeah they weren't terribly pretty, were they? Akia in Japan made a rebadged version of this with a slightly different front panel and a stand to orient it on its side instead of as a desktop.
Anyway UMAX were one of the more interesting clone builders in that these are Alchemy-based systems but they use an entirely custom logic board (Apple's Alchemy systems were the drawer-style logic boards for the 54/6400s) whereas lower-tier cloners just used a variation of the Tanzania/II architecture (which were mostly just rebadged StarMaxes). I think UMAX and PowerComputing are the only ones who built custom Alchemy systems (and UMAX would sublicense these designs to others such as Akia).
I doubt I'd pay more than $100 for it unless it was one of the top-end models with the fast L2 cache on the processor card, or one of the elusive Akia or Tatung or other off-brand cloner's version of it. I think I paid something around $100 for the UMAX Apus 2000 (which is the same thing only sold outside of the States) that I bought about two years ago.