Also, if you are looking to make a couple hundred dollars extra at any auction then just make a Ms. Pac-Mame. You can usually put one together for under $250, assuming of course that you can get the basic cabinet itself for cheap.
$50 cabinet.
$20 repro Ms. Pac marquee.
$100 19" monitor (used).
$20 old pentium 200 or better computer.
$10 cheap PC speaker
$10 start buttons and a used keyboard or joystick to hack (perfect application for a keyboard hack, as Ms. Pac never has more than one key pressed at a time.
$16 New Ms. Pac joystick.
$20 misc (plexi, light bulbs, etc, this will vary from cabinet to cabinet).
Total $246
You can also splurge and get a repro overlay as well, which will add to the sale price. If you can find a mini or a cocktail then you can reduce your costs by about $80 for a mini (only needs a used 14" display), or by $64 for a cocktail (also only needs a 14" display, but will need a second joystick).
Either set it up as just Ms. Pac-Man, or put Pac, Ms. Pac, and Junior Pac on a menu. Make it dos though, so it can be shut off easily.
Either way, you can probably expect $400-$600 for your non-original Ms. Pac. Even after auction fees it should be enough to pick up an extra game. By the way, it doesn't even need to be a Pac cabinet, any cabinet is fine for this.
Of course no real "collector" will buy it, but there are a lot of non-collectors at any given auction who just want a Ms. Pac, and they don't really care too much if it is original, and anyway, a comp based one will be more reliable anyway (better for someone who doesn't know how to make repairs).