naw, it doesn't need to be perked. it's like the Japanese Spit IX. And it'll have Ki-84 as it's tag, so it'll have a "you need to take care of me soon" sign on it.
The Tempest, 163 and 262 are priced about right.
the 152 should be about 5 points, and the Spit XIV and F4U-4 should be 10-15 points.
unless you remove the perk tags (call the XIV just SPIT and the -4 just F4U) then I'd say 20-30 points for them. As it is, you fly a Spit XIV anywhere, and just about everyone with a red icon will come after you, regardless of their own safety.