Fisher Price Play Family figures, or as they're often known "Little People" are, in my mind, the prototype child's toy. They're so basic and fun and I had a ton of them as a kid. I didn't have the Sesame Street figures though as they came out before I was born.
I had often seen the Sesame Street playset at garage sales or collectibles stores, however it was often without any accessories, or the lithograph on the side was in horrible shape, so I didn't buy it for the longest time. Then one day at a small church rummage sale I bought the one below from an old lady which was absolutely packed with stuff. The handle was broken on one side, and the chalk board had crayon on it but the litho was in wonderful shape so I offered her $30 (a number that she was pleasantly surprised by).
The second playset is less cool, and I didn't really "want" it, but it was a decent price and it had one of the figures I needed. The figurines I've had amazing luck finding for very little money. The only two I'm missing now are Gordon and The Count. People keep telling me how not rare these figures are, but yet nobody seems to have them for sale around here. But, the hunt is half the fun.
There are a couple pieces I'm missing for the playsets too, but I feel pretty confident I'll find everything locally.
My collection so far:
Play Family Sesame Street Playset
Sesame Street Clubhouse
Mr. Hooper, Susan
Big Bird, Mr. Snuffle-upagus
Prairie Dawn, Grover
Sherlock Hemlock, Roosevelt Franklin
Herry Monster, Cookie Monster
Oscar the Grouch