Hi,
You have to network. Eventually they will come to you. You have to be carefull of what you wish for you may get it. Have more than my share just given to me. Just when you think it is the last time you are going to get any large stash, there is another one. Had one person give me 4 station wagon loads of apple II/IIgs items.
Next you have to look for auctions of the city/school surplus. The glut of the Apple II has passed thur these years ago, but yet there is still some in the pipe line, or dark corner. Was at auction and they have some IIes, with software. These come up once or twice a year. Just have to keep looking.
Next is the Hamfest, these have been down sized over the years. But you never know what you will find. They had or have one in the Dallas area that was written about in the Detroit Free Press years ago. They talked about it started in the 40s. That the vendors would show up earlier and earlier for the best parking spot to sell from until they started to show up at midnight to start selling. They never said where it was exactly. Look like it was quite large. Not as large as Dayton's OH. But larger than anything around here.
The best thing I got at a Hamfest was the Mountain Expansion Chassie for the Apple II full of some cards for $5.00. That said, Hamfest start early and end early like before noon most of the time. Best deals are at the beginning and at the end. They are now around 30-40% computer related.
Here is the a Hamfest locator URL, just set it for the state and see if any are around for the next few months. They do not advertise, at least here in MI.
http://www.arrl.org/hamfests.html
Here are some from Dayton's, OH
http://tmedlin.com/dayton.html
http://www.users.voicenet.com/~johnd15/hobbies.html
http://www.wa8dbw.ifip.com/Dayton2001.htm
Some of the Colleges have disposition centers, their hours may strange, as well as their pricing. The students may know where these are since they can get a discount. The ones over here have no software. They pitch it all. Afraid of all the legal issues.
Last but not least is the recyclers. I believe they have been getting the all the stuff, since the nobody wants to put up with auctions, and garage sales.
A city near me posted you can drop off your old computers. The recyclers usually charge you when you drop them off.
Take Care,
George