That Charger is one of my all time favorite B-bodies. Same basic body as my 73 Roadrunner, and even me being 6'8" all I had to do was adjust the seat a little to have plenty of leg and head room.
As for cars I regret selling, some more then others but here's my list.
69 Charger 383/2bbl car but had a 400/4bbl in it when I got it. Sold it after I spun out on black ice and crunched the rear pass quarter. Found it last year in the parking lot of the mopar show, really ratty now and tried to talk to the current owner but he was a total d!ck and just yelled at me to get away from his car.
72 Demon, was a bare bones car slanty/auto on column, with 14" steelies and caps, brown with tan bench. Grenaded 2 slanty motors and was so pi$$ed I called a wrecker to drag it off.....really regret that decision.
1980 Plymouth caravelle, 2dr. was 318/auto
68 Coronet 500 convertible, not because I really liked the car, but it was my very first full nut and bolt resto.
70 Sport Fury 318/auto
73 Roadrunner survivor car white with white bucket console interior, 340/auto with 3.23 suregrip, ralleye gauges etc. Found it a year or so ago being sold to a USA collector for $25K USD, tad more then the $7500cdn I sold it for. ;)