Apple II stuff is [finally?] climbing a bit in price. I would wager since original systems are still present in such numbers that previously clones didn't garner much attention from the average person or collector. Now, since original systems are starting to command some $$, I can see clones starting to have a little value and perhaps sell for more, given I doubt most are present in numbers anywhere close to Apple's production runs.
I wouldn't mind owning a clone, but even as a pretty big Apple II fan it would mostly be a curiosity to hack around with. I'm not going out of my way to find or spend money on them at the moment.