I have some old stuff but it is mostly 2000+. The lack of old stuff is a combination of
1) there wasn't that many releases to begin with (the computer/CD-R era has provided an explosion of do-it-yourself albums)
2) i didn't have money or a car back then so I couldn't buy as many albums or travel to different stores to get them
3) its almost impossible to find anything after the fact. 98% of these never even have a second delivery to the stores...