I highly recommend the MST15 which you can get from http://www.williamandjones.co.uk/ It lifts 150kg so easily enough for a pin, and only weighs 33kg so you can actually pick it up and get it in and out of a car (if you're strong). It's narrow enough to get in there between the legs (fnar fnar) and the handle folds flat so it doesn't take up too much room.
I keep one in my pinball room and use it move them around if I need to get the glass off one of them, for leg levelling and especially for getting pins out of the back of the car. Wouldn't be without one....
I happily move my pins with this. Just prop up the front end, slide the trolley underneath - with packing if necessary, let the front down and pin rocks onto trolley with all legs off ground. Easy. It was cheap as chips - circa £20: I made it from scrap wood from a builder's yard and castors rated 90Kg each bought from here (actually they sent me braked castors which were more useful than I thought they'd be):