I've stopped by there before. (They used to be located on Bell Street Coburg)
They have about 10 pins on display, and some of their cocktail tables. Pins are all DMD, and yes you can play their games.
Prices on pins seemed on the upper end, but I'm not sure to what level they are cleaned up restored internally. A hand full were in mint external condition but were highly priced from memory about the price of a new Stern. Most were in normal/good condition. I didn't ask if he had room to move on price.
Its worth a look, but you will not find a gold mine of gems at a good price. (A few years a go they had an average condition Sharky's Shoot out for $3.5k. That was about their lowest price on anything).