I might as well chime in and list the purchase price of all my (current) cabinets. I will also include the condition they were in when I got them.
Kangaroo $100, minty, working, dead monitor.
Crystal Castles. $250, decent, fully working. Has some major scratches on the cab.
Time Pilot (cocktail). $50. good monitor. no boardset or harness. Had major glass flaking, and most of the metal was rusting/flaking. (This is ALL fixed now, but of course the monitor blew on it).
Victory (Pinball, shopped), traded a Jamma cabinet, 17 boardsets, about a dozen marquees, and a few control panels for it.
Force II pinball. (semi-working). $150 ebay, buy it now.
Cherry Master cabinet. Originally paid $50 for this as a fully working poker machine.
Artic Mini mame. Traded a poker boardset and wiring harness for it. Was complete game minus boardset, and with broken joystick.
Battlezone no boards, no monitor. Free.
Amazing Maze. Complete, bad boardset. Free.
Tournament Solitaire complete, very nice, had battery problem. $52 ebay.
Space Firebird (first time). $100. Complete, working, had missing sprites. (later, parted, and sold).
Space Firebird (second time). no internals, no joystick, got it back for free.