I think onewheel riders can be some great salespeople for the product. I was recently at a bike rally and got stopped many times to explain what it was, how it worked, and even risked my precious baby with a few demo rides for folks I didn't know. But I didn't try very hard to sell it to anyone because there is little incentive to do so. I think a referral program offering credit towards additional one wheels, future versions, accessories, service, repairs, or extended warranties would be a great incentive to try and actively close some $1500 sales. A cash reward or generic gift card would be a nice option too, but even credit would greatly help incentivize us.
Users could register in the referral program, and we could purchase $10 worth of the business card size promo cards with our custom referral code printed or labeled on them and the recipient / new purchaser would get free shipping or a spare pair of crash guards as an incentive to use the referral/promo code when purchasing on the site.
I'm sure there's some reasonable margin in these devices so you can sign up distributors / retailers later on, but for now an incentive of $250 or so to people out showing off, loving, praising, demoing your product would probably give direct sales an extra boost and keep that back order channel filled up! It would give us some serious incentive to market and praise the product online as well.