I lost a $25K sale today because the potential buyer looked at a domain's archived history and found out the domain was offered on the landing page for way less a few years ago by the previous owner. Unfortunately, it's a lead via a marketplace so I can't communicate directly and make a good argument about why the price it once cost shouldn't matter. You win some, you lose some so though it's definitely annoying- it's not the end of the world. But it got me thinking about this matter and I thought it would be interesting to hear some opinions and convincing arguments. So... what would you say to convince a potential buyer that the price a domain cost a few years ago shouldn't matter and that buying it for a much higher price is justified?