Selling the Slingshot windfoil I bought a few months back. It's the higher lift model and can fly a very low speeds for a lightweight rider. Maximum speed I've managed has been in the low 20s.
Works well with boards of 70-85cm width. Has both the deep tuttle and 4-bolt mounting heads plus a spare fuselage.
Has a few dings from grounding at low speed but they are built tough.
$900 USD or CDN equivalent. I can supply an older formula board for another $150.