personally I would be appalled...really a deposit for what...who in the right mind is NOT going to go pick up their machines???
and even with older machines, if they don't come back, you are still not OUT anything...you have a viable piece of merchandise that you can resell on this board, ebay, CL, etc...so really...a deposit for you work....why....
I think they WE should require a receipt that says they have the merchandise and what condition it was in when we left it with them. How many have gotten machines back with more issues then when they were left? Or how about this one,,the feet are missing, the power cord gone...I have seen all these issues and more...so be sure you ask for something in writing saying you left ALL Of those parts with the machine when you dropped it off to be cleaned/repaired!