That's good, so now you just need to agree on price. Just keep after it.
Years ago an arcade one town over from me had a ToM prototype and I talked to the manager every couple months wanting to buy it but he always refused. This kept up for over a year until I stopped in to ask again and found the game wasn't there any more. I asked the manager and he said they had moved it to another one of their arcades. I quietly asked another employee if he knew where it went and he told me it was in another city about 70 miles away. So I drove there and made that location's manager an offer of $1800 for the ToM proto which he accepted and we loaded up the game and I drove home with it. It was very dirty but cleaned up nicely (I used Q-tips to clean the undersides of all the inserts before installing LEDs). I have since added ColorDMD, 3-D translite, gold powder-coated legs and leg bolts, rabbit-in-a-hat shooter rod, drilled out and backlit the clock in the speaker panel, and replaced the trunk board and trunk motor and opto interrupter. As backup I have a pair of new ramps, a plastic set, extra slingshot plastics, and several spare trunks (including two of the new unbreakable ones).