CBR should be able to connect the "wanted" list with the "for sale" list.
If I post a specific comic book for sale, why isn't the wanted list (over one million books sought) contacted immediately if it matches? By connecting buyer and seller, CBR can take a small per cent for doing so. It can't be that hard to set up. The buyer and seller work out the price, shipping and other details and CBR gets their cut, with (hopefully) not too many snags.
I think your idea got some kind of response Bru, You should be proud :)
James Backley commented
i actually think this idea would really be helpful. good job