For me, it wasn't so much collecting as accumulating, over a 10 year period, multiples of planes that just had me trading up to the best of the lot, and this past year I thinned the herd, leaving me with one of each of stanley's bench planes, 'cept for a #2, which somehow I never came across. I then took the proceeds and bought some newer versions of very hard to find stanley planes, like LV's low angle jack and smoother combo, some chisels and a 98 and 99, stuff like that.
But I still can't help stopping when I see a garage sale, 80% of the time, its a waste of time, but every once in a while, like this past saturday, while all the ladies are oohing and ahhing over the dainty teacups and Hummels for sale in the dining room, I wander into the garage and what do I find hanging on a nail but a nice turn of the century Disston D8, and underneath it a 14 or 15 pt Disston split nut backsaw (circa 1870 or before) both in pretty nice shape. Now, I already have one of each, but just can't leave them there so home they come, got sprayed with some WD-40 and one of these evenings I'll clean them up a bit and if they are not better than the ones I have I'll sell them off.
The herd will get larger.......