Is the novella, "The Fireman" available anywhere?

How possible would it be to set up some sort of Ray Bradbury auction or exchange board here?

Ray's novella,"The Fireman",originally appeared in the February, 1951 issue of GALAXY MAGAZINE. A link to the cover of that issue is:
http://www.sciencefictionmuseum.com/classics/gc5102.html

I suggest you keep your eye out on either eBay or the Advanced Book Exchange for copies. I have seen copies for sale listed in both places in the past. The link to the Advanced Book Exchange is:
http://www.abebooks.com

It appears in its entirety in the anthology "Science Fiction Origins," edited by William F. Nolan.

Dandelion, thanks! I was unaware of that book appearance of "The Fireman."

I checked the Advanced Book Exchange, and I saw nine copies of Nolan's "Science Fiction Origins" that are currently listed for sale there.