Chagrin:
octopart.com has historical chip prices.
I didn't know that. It's interesting. It puts the lowest price ever at $2.29 and I have a record of getting it for $1.92 for 25 on 1/21/13 while it puts the price at $2.63 on that date. I wonder if this is for quantity 1 for all suppliers or some averaging over all quantities and all suppliers. The methodology isn't mentioned. It has the prices higher than what I paid for back then and now gives prices lower than what Digikey wants (now $3.10 @ 25, $2.90 @ 25 when I posted this two days ago!)
PEAK AVR! ]
But yeah, it went down and I bought it in a down area and it went back up.