well it's sort of different example, but
if you bought grado HF-1s, when it's released, and you decide to sell it after 10 years.
Due to limited number of headphones produced, price has gone up, but you decide to sell the item at the price you bought it for, rather than current market value.
Someone buys it, and decide to sell it immediately, making some quick cash
I have no problem with the 2nd seller, and I would probably do it as well.
If you are going to sell the item at ridiculusely low price, someone's likely to sell it right away for quick profit. and I don't think first owner has any control over 2nd owner's actions.
Why not just sell it as a pretty good deal (like 10%-15% less than market value) - someone will snatch it up quickly, and more money for your pocket, while avoiding such issues