Probably paid $100k each for those. ($200k). Collector Insurance for 21 years, assuming stated value (roughly $15k-$20k), 1 year oil changes, and 5 year full fluid changes (if done), $5k, and to top it off. Loss of investment of capital for 21 years, which is impossible to determine. But even if invensted in MMA's- 1099income tax (no risk of loss), would easily have earned $10k per year (on $200k amount, averaged out over the last 21 years).
So basically, he's got over $400k *******, right there, The way I look at it. He might get $50k a piece for them.