Anyone would jump at the chance to buy the ball that Mark McGwire hits for his 62nd dinger. But it takes an aficionado to collect, say, Wrigley Field ivy. For seekers of the less obvious, we suggest the following.
You could buy a chunk of turf from Lambeau Field, but perhaps you've got designs on something more aesthetically pleasing. Ballpark Classics offers original blueprints, sketches and construction photos (such as one of the Polo Grounds, above) from the archives of the engineering company that did the buildings.
Everyone has noshed from a cereal box with a sports star on it, but it takes a flake to turn those recyclable cardboard containers into a collecting hobby. This site has a swap list and, for those cereal chatterers, a link to an on-line discussion group.
Can't go another day without getting your hands on Mike Piazza's pants? This site, which specializes in game-worn apparel, is for you. It also offers items such as a Bill Bradley New York Knicks warmup jacket and a Jim McMahon Chicago Bears jersey. Odor included, free of charge.
sites we'd like to see
Chat room for members of swimmer Gary Hall's fan club.
Stat source for fans of golden-age signal-callers Steve DeBerg and Warren Moon.