I'm the same way with watches. I think about selling them because I'm not really into them anymore but just can't do it. Part of the reason is last time I sold one online, some asshole tried to scam me out of $3200.
Are you looking for any Breitlings? I'd consider trading some for pins.
I did the same thing with my boat. Thought I was really going to miss it, but a day after it was gone...no regrets. haha.
I sold my Land Rover Defender, missed it, bought another one a year later. Did the same thing with a Breitling Bentley Motors.