I am interested in the PCBs and the parts. I want to do the soldering myself (both to reduce cost and because I like it). Depending on how much they will be, I'd want anywhere from 1 to 4 or 5.
I highly doubt it, but if the price could get to $15 or less per, I'd probably be in for 5. If it could get to $10, I'd do my best to buy 10.
I'd still be interested in the controller at a higher price, but I'd only be in for 1 or 2.