From what I saw at the 1500 the price difference seemed to be about $50. That's why I went with the Kel tec.
The difference between the two varied depending on which vendor tables you were at during the 1500...I was actually scouting around for the LCP in olive drab green for a buddy and while I didn't see any green ones in the entire place, I saw prices for new black LCPs ranging from a low of $269 up to a high of $399. I guess that just demonstrates the need for comparative shopping at gun shows.