Got a newsletter yesterday from Kitlinx where they are estimating a $70 MSRP for this "large" kit. Seems a bit high, although in looking at their actual web site, I see an estimated price of $55.99. That's probably more reasonable.
I'd think the P-38 would compare relatively equally to such other Tamiya kits as their Beaufighter, Mosquito, and He219, which go between $35 and $46 on the Kitlinx site. The Betty bomber is a bigger aircraft and lists for $67.