I'm not a pipe smoker, but in 2003 my grandmother had a renter skip town and leave behind all sorts of belonging, including a suitcase full of pipes. 134 of them, if memory serves. I had fun researching them and gently cleaning them up (just enough to be more presentable, leaving any desired restoration to others) and then selling them on eBay. Savinelli, Castello, Dunhill, Charatan, and many others including some absolute works of art from a Scandinavian maker whose name now escapes me. Apples and Billiards and Bulldogs and Calabashes (seems awkward when pluralized) and so many others. It was fun. And I really didn't mind the extra $3000+ that I got from the lot (with some expenses along the way, including the Harbor Freight bench grinder I used to lightly buff them, and which I still have).
In the last 16 years I have sold a lot of things on eBay in many categories, but the pipe collectors were the most enjoyable group I dealt with. By comparison I wouldn't sell another vinyl record or toy train for most any price, because those groups really were terrible, judging by the experiences I had.