i'll explain how the midnight deals work...

matey wants your coz and has the brass to finance the romance but he needs a driver to bring the car back etc.
or..

work shags up the normal viewing time and matey really wants the car so mentions about comming down and how far it is etc etc,usually that type of person hints they are buyers and have the loot and fook me who selling a car doesn't want readies??

for safetys sake i would use a relatives address if your dealing with strangers as it used to be a recipe for disaster giving out your address with a cozzie when selling in the automart now autotrader.

this is true i promise.

fella i know selling a rs lives opposite a police station,gives the address out to a few people from a dodgy area of the north west and the fooking car goes missing from right opposite the cop shop that night.
thats how it used to be selling cozzies, and them new websites that ask for your postcode and show it in the ad to all and sundry can piss off, i don't want a pikey knowing exactly where my 08 twin wheel caravan thats ready to go stays the night.