Hi Lexie.
I actually did that once, (but only once).
The poor guy bid $56.00 (or more) for something that just hit the market. I e-mailed him to take $25 off the price if he sent payment right away.
I was afraid he might realize he could purchase the same item from the manufacturer on line, delivered for $19.95
That same item is on eBay now for around $10.