I had a 69 Bonne 4d hdtp 10 yrs ago (My son has it now) It had the 428CID Moved quite well, handled like a coal barge. I paid $1800 for it. That was a fair price. A convert would be worth several K more, but still short of $15K unless it was a very low mile, like new, unrestored survivor. Then MAYBE, $15/18K
I had a 69 Bonne 4d hdtp 10 yrs ago (My son has it now) It had the 428CID Moved quite well, handled like a coal barge. I paid $1800 for it. That was a fair price. A convert would be worth several K more, but still short of $15K unless it was a very low mile, like new, unrestored survivor. Then MAYBE, $15/18K