+ another 1!
Have a read of the stuff on the WOK, especially the sand stuff, take all your own tools, and a torch, in order to pop the inspection hatch at the minimum, make sure you have sockets, attacking it with a monkey wrench won't make you look very professional, be nice and if you can, show the seller some of the stuff from here that details the pitfalls of Rajkot iron on a tablet, fix your top price and take that much - and no more - in cash, when you are getting close flash the cash and ask which he would prefer you to walk away with, remember that lister(iod)s are like nurses and buses, there's always another one coming down the road, eventually......
Cheers
Stef