I'd really love one, but sadly I think they sell for more than they are truly worth.
I really want to play pacman arrangement mode.
I think you can expect $150-$200 for one depending on condition. The boards do suffer from some cap issues which can cause some color and sound problems.
Dig Dug Arrangement is fantastic as well. It's a really nice update and far better than the original if you ask me. And I actually like Dig Dug a lot. I just think Dig Dug Arrangement blows it away.
The last couple Namco Classic Collection Volume 2 boards that I saw for sale here had asking prices of $200, if I recall correctly. I'm too lazy to search for old threads.