Just some feedback, I think you'll have a hard time at 35.00. For some reference points, I've sold the "lesser" PS-II's (Partizon, Argent, Ventris) all day long on Ebay and here at 50 bucks. Leviathan would likely be something a bit higher than that, although not too much as the Loc Forte (which is nearly identical) is selling for 65 bucks new. Comes with a slightly larger chute and larger motor mount. https://www.discountrocketry.com/precision-forte-p-1800.html
I have many good things about this kit. I sure would love to get the opportunity to own and build one of these kits. I have read online people can get their L1's with this kit which was a economical option back when they were available.
I sold one not all that long ago for about 45ish i think, don't remember for sure. I still have one along with a Partizon, Argent, and Ventris that I have considered selling. Prefer to sell as a set. But for 35.00....
A superb kit. I built mine with West System epoxy and have flown it many times with full H's. But get rid of the underwear elastic use a real recovery cord.