Thanks for the feedback, everyone. Bummer about the US import hassles. That certainly limits my potential market!
I figured 3700 was fair given the tired hybrid pack (and given what KBB said). But I get the idea I should look into this a bit more and maybe raise the price.
I'm going to try to keep it together as a package, but if the aeromods don't interest the next owner, I'll certainly make them available to other Insight owners.