In that condition you're not going to get a lot for it, they're pretty common. At least the frames are anyway, finding the correct parts to restore it would cost way more than it would bring on ebay. Suspension bikes are kind of a red headed stepchild in the bmx world, Considered more of a novelty than a serious race bike, there are a few who collect them but for the most part they don't bring the interest or money that some of the rigid frames do. Of course there are exceptions to every rule and some rare boingers do bring serious money. Kawi is just not one of them.
Funny thing is thought, Bill Bastian (the builder of the early Kawis) used left over Kawasaki tubing to build some rigid frames under the brand name "AAA" and those (basically a rigid looptail Kawi ) bring big big bucks. Even though Kawi came first, AAA is credited with building the first aluminum bmx race bikes.
Go figure.