They weren't a great bike at all, but one's that were looked after seem to have survived, so it's somewhat rare, but definitely not a collectors item.
They are fragile compared to the DOHC Kawasaki's and Suzuki's of the period, so more of a novelty item than a bike that can be ridden hard for long periods.
Look after it and you'll probably be the only kid on the block to own one. $1 per cc, max.