I have upwards of 200, but my pipe preferences have gradually become more expensive with the passage of time. As a result, my collection runs the gamut of quality from some MM and Dr. Grabows all the way up to Dunhill DR, Alex Florov, Benni Jorgensen, Tonni Nielsen, Peter Heeschen, and so forth. I've started to sell some of my mid-grade pipes that I don't smoke. It felt really good to sell a few, but I've managed to buy as many pipes as I've sold during that period. Some of my lower-end pipes I very much enjoy and some have memories of being a thrift/resale/antique store find and were restoration projects, so it'll be hard to part with some of those. Most of my pipes have been estates. I generally don't pay more for a pipe than I feel I could get as a resale. As a result, I've made a pretty decent profit on each pipe I've sold, but after having invested my time in cleaning and restoring them.
I'd like to try to limit my pipe collection to 100 briars, which means I have a lot of pipes to sell. One hundred seems like a large enough number for someone who doesn't just collect pipes -- I smoke 'em!