Don't bother. The seller just bought this (off craigslist no less) in Olympia for $50 and is trying to flip it. The cab is trashed and it was barely worth $50 in the first place.
This was posted about it just last night on the SMAC group:
"It's the same one from Olympia I saw last month. Coin door gone, both monitors missing, cab sat out in the moisture for over a weekend and has expanded, no art work on the sides, boards look clean but untested, and a few mystery wires inside. Glass or plexi was carved on a little bit if I remember right. There's a reason everyone was passing on it during the garage sale."