I suppose this black base renders the easel of little value. While it's fully usable by simply putting a piece of blank paper in to compose on, most won't want to go to that additional step.
I appreciate the replies.
1) Are you planning on selling it? These routinely fetch $450 on eBay for ones in good+ condition. They are quite valuable, but you have to be careful with the shipping. A proper sized box will cost about $10 new, which is what you should use, not some crappy used box.
2) Almost all good printers focus on a sheet of paper that has been fixed out. They DO NOT focus on the easel base. Therefore, the color of the base is not important in this sense. I paid about $450 for a real nice one a few months ago on eBay and believe, a black base would have been an attraction to me since I use ortho film a lot. I would have paid more for it.
3) You seem to think the black base detracts from the easel. Just the opposite. If you sell it, this is a FEATURE that you stress is there in case they want to enlarge onto ortho film. Many ULF photographers that make internegatives will be attracted to this, even if they lay down black backing paper over the easel anyway.
These 20x24 easels are valuable, highly sought after and you should be glad you own it. If you want to keep it, you have a real nice piece of equipment there to use for yourself. Just learn to put white paper down to focus on when you enlarge, that is what you should be doing anyway. If you want to sell it, remember you have a unique easel there and you'll probably get an extra $50 or so because of it.
Good luck whatever you plan on doing with it. Or you could sell it to me for $50<g>.
-R