Looks like, on eBay, there were only three sold recently, and two of them were from Great Britain. I'm unsure of the exchange rate. One was sold from the US, but it was sold in conjunction with another Frank Miller Batman TPB, so the price is most likely inflated.
There are currently four of these books for auction on eBay, three with starting prices of $9.99, the fourth with a starting price of $20 (but is again in tandem with the Miller paperback). None of them have bids. There's a couple of these books for outright sale, as well.

If you really need the money, I'd hazard a guess that you might get $9.99 + S/H costs. Not great. Good luck.

Thanks, pseudo....I never even thought to check eBay. Duh. I was looking on the comics pricing guide sites.

I have the Frank Miller Batman book, too, in hardcover(my wife got them both for me for my b-day about ten years ago)....I found it. It's currently selling for around $70 for a mint-condition copy. Mine isn't mint, but it's very good. It still has the attached bookmark, too; that might say something. I've been thinking of selling them as a set.

I do have other comics, however. BELIEVE ME.
Hopefully, I'll be getting back to work soon though, so I won't have to sell ANY of these little dears of mine, anyway.

I saw that issue with the Joker a long time ago. It would be hard to part with your collection I know. I was going to recommend Ebay too. Since you have already, you can also try these other sites:

http:///www.epier.com
http://www.bidville.com
http://www.livedeal.com
http://www.overstock.com

I got this list from a fellow JoeUser, Kobrano (he moved on unfortunately) from one of his blogs about selling on Ebay on other sites like that.

Thank you, forever, I'll try your links.