I am getting this question so regularly that I must do another post on a source. I posted on him a while back, but I didn't use any pretty pictures.
First, I should say that a great majority of my stamps come from my dear beloved Grandfather, who is 90 years old now. He worked for the post office for most of his adult life, and he collected stamps casually over many, many years. Now my mom and I share his stamp collection, and we both use them.
Second, I do troll eBay for a few favorite stamp designs. I generally won't pay more than face value for them, which means I don't find the deal I want very often. But I've picked up some Muppets stamps, bat stamps, and a few of the peachy letter-writing type stamps that way.
My BEST recommendation, though, I will repeat from this post I made back in May. (For those of you that have already read this and given Errol your business, sorry for the repetition.)
On the Stamps post at Letters and Journals, I read about Errol Murphy (
So, if you're looking for a batch of old/vintage stamps for fun postage, Errol is my top recommendation.
As a side note: even the stamps that he used on his envelope to add up to the 42-cents postage were very cool!
[UPDATE: as of May 19, 2014, Errol Murphy's most recent contact info can be found on his website, murphs-stamps.com.]