I remember reading in Victors book to check at yard sales and second hand stores but that never worked for me, well one time in Hawaii I went into a kite store and found a Space Saucer in the package! I know it works just so not so well for me. I got several discs from people that "GOT IT AT A YARD SALE"! So I still stop from time to time and ask for flying discs and mostly get funny looks.
I was thinking of what collecting discs was like before the internet! First off you needed to be at events, to get first shot at killer plastic you had to look through it all and find your treasure. Being in touch with other collectors by phone and mail was a second way to add to your collection. Having friends bring you plastic from their travels and last knowing folks at the factory always helped!
There are several large collections from the pre internet days. I bet it was a full time job! I also think it was a little more personal. I sell to folks that I have known a long time but not very well! By phone and mail I bet you knew people much better.
Early e bayer's that knew what they were looking for got stuff and for cheap, now even if you find a treasure chances are it will be broadcast for others to see, thats ok as I get lazy on searching it is nice to have a " Got To Have " brought to my attention. ( but it is going to cost me )
I have fun seeing new disc collectors get started, and on occasion help them with something cool. For me it has a connection to the past and a kid like feeling, it is a warm fuzzy!