I had a few that in hind-sight I wish I'd bought but in recent years I found them and bought them. Now I'm content ... I've said that before but now in my mid-60's and no gun-nuts in the family to pass them on to, I've considered selling some of them off, but even having trouble doing that ... cars, home and is paid for but still have one in collage but will probably sell off the happy-switch otto's and take a few well deserved vacations with the wife in the next few years. There really aren't many that I kicked myself over, because if I wanted it bad enough, I found a way ... Some, I just didn't want it bad enough until years later. Years later, I had regretted passing on was a Valmet Tube-Folder, the one I passed on was a 223, if it had been a 7.62x39 I'd have bought it then ... it wasn't, so I passed but a few years ago I found another Tube Folder in 223, bought it and discovered what the attraction is. Also wanted a SiG 550 back in the mid 90's, but I figured there isn't anything it did that an AR wouldn't do ... so I waited 25+ years and paid 4 (or more) times as much for a used one! Another was a Knights SR25 Match I passed on back in the day and acquired one 4-5 years ago. Most of my problem then was not being able to appreciate the refinements.