Signing a power of attorney for bank when selling your RV

RubyRV wrote:
I have a prospective buyer for my RV and HE is getting a loan thru Southeast Financial. I have complied with all their requests, RV inspection, Purchase Order, now they want me to sign a Power of Attorney giving them control over my title prior to giving me a check. I said I would sign one and hand it over with the title on receipt of the check. They said no check till I sign it.
QUESTION. Has anyone done this ? Do I have concern ? ETC. ?