However, I do understand that scarlet owners want to get out there and shoot, and make some money back on their $15k. There's no harm in that. It's better to make something sometimes than having a camera sitting on a shelf. It really is simple supply and demand, there's more cameras out there so there's more people willing to give away the camera for a low price.
I bought my camera to make my work better and I charge a realistic rate for it when I dp. I do make about 25% of my yearly income on sub-rentals but I'd hate to be dependent on rentals alone.
I don't really see a solution to the lowering of rental prices other than the possibility that the lowballers will not be able to sustain such a business model. I'll not hold my breath waiting on that to happen.