as nslinhar says, you contact car dealership or some kind of contact center (electronics company, post office company, etc.) to check how quickly they react, whether their signature and whole answer is in line with company standards. I've also done few mystery chats.
but as mentioned, I've seen few for $1, some for $10 and obviously want to find out more MSC's that offer higher fees.
guess that's what we all want, so on second thought, won't be surprised if not MSC's are listed in your answers