I have let a sellers know a chip or other memorabilia they're selling is worth more than their asking price, more than once. Both online and in shops I frequent.

Sometimes a reply is sent back to me and other times not. If the former, a discount is given on other purchases and if the latter, I try my best to buy it.

The important thing to do is remain true to the standards we accepted to abide by when we joined the club. You really cannot lose sight of that.