Neo-Geo Forums

I'm looking to sell the following CPS2 boards to a guy at work and I need a hand pricing them.

-Dungeons & Dragons: Tower of Doom (A + B board, Blue)
-Marvel vs Capcom (A + B board, Grey)

Looked around eBay, but I know that it doesn't always reflect real street price. Both are in really good working condition, but I have no clue when the batteries were last changed. Bought them with my cab back in June and the guy didn't know when they were changed.

I would like an estimate of how much should I ask for. If the buyer changes his mind, I will offer them here for sale.

Thanks