Different strokes for different folks.
My journey with pipes has gone through several phases. I started out just buying what appealed to me. Then I got interested in particular makers. If having a number of pipes made by a particular maker is collecting, I certainly qualify.
Last time I counted there were over 100 Family Era Barlings as well as a few Corporate Era pieces. They range in age from 1882 to the early 1970's. And my interest in Barling didn't stop with pipes. There's the only known complete copy of Barling's prewar catalog, Barling boxes, a Barling display case, Barling pipe tools and a cutter top of Barling branded tobacco from the 1960's. I recently received the wonderful gift of a framed and mounted 1880's era letter from the head of B. Barling & Sons to the owner of the land on which their factory was built. Seems everyone bitches about the rent.
Early Kaywoodies were also an interest and I and collected those, though not to the extent that I collected Barlings. The Kaywoodies range from 1919 to the late 1930's.
There's also a nice grouping of prewar Sasieni 8 and 4 dots, as well as small groupings of Comoy and Ben Wade.
I have a thing for Britwood. They smoke wonderfully well, and fit in with my interest in the history of the pipe trade.
But I also like American artisan carvers whose work shows a distinct personal style, like Scottie Piersel, Lee Von Erck, Tony Fillenwarth, Trever Talbert, and Paul Tatum, who I interviewed and about whom I created a page on Pipedia.
Aside from those groupings there's a motley assortment of pipes I bought because I liked how they looked, or I was just curious about that maker.
All of this had to be done on a strict budget, so while I have some very fine and rare specimens in the Barling collection, there are a great many popular models that I don't have because I'm not going to compete with deep pocketed collectors.
It requires patience and in some cases luck to find primo examples for a fraction of the usual auction price.
I've also been the beneficiary of a few people in the piping community who have offered me great deals in thanks for research I've done for them or out of friendship.
I'm no longer buying because I don't need any more pipes and I'm more than satisfied with what I have. Yes, there are a few white whales out there, but they're safe from me, unless I can acquire them for a fraction of their market price.
These days I collect pictures for my Barling archive. From the standpoint of building a trail, they work just as well.