I haven't been on much in the past few months, so I'm limited in the examples I can give, but...
Well, the obvious example would be to compare the same item from before Rogers to after Rogers. You might say that this only happens because of the increase in the amount of circulating gold, but this only affects the price when people are willing to pay more for the same items (when demand increases).
If you don't like inflation examples, dimlies were sitting at 2g each for an extremely long time (CB to mid TFT?). Right now, I believe they're 1-1.5g each.