First set 6/2010 and second set 8/2010 for me. I paid around $100 each for the kits, but at the time it was a great price and these were one of the best price-performance wise
One pair of mine came from NJ warehouse & the last pair came from the TN warehouse.
One thing I like about Newegg you can pull up old transactions to check what
you payed, what date you got them & what warehouse they were sent from.