The fairest price is a negotiated price based on current market prices.
If I was buying a watch, I couldn't care if the previous owner had it for 10 years, 10 months, 10 days or even 10 minutes.
No one is forced to buy, it's their choice and nothing to do with anyone else.
Selling at "mates rates" is all but impossible on the internet as thousands of us are buying and selling all the time. The only way to sell at mates rates is to do it behind closed doors where only a select few are privileged to view and operate and then the criticism of "it's who you know" crops up.