Both your dry blower and clean-up sluice look to be very well made. You must have an awesome workshop and skills to be able to produce these units.
Given the quality of the workmanship, I am sure that others out their would want to purchase your machines (Art).
I think this might be why Luvgold is wanting to purchase your gear.
If you designed these units, I think that some people may want the designs so that they can reproduce your item; however, be careful here, as others may look to patient the designs, so as to make money off your great work.