I'm not really sure why its such a big deal for some players to want to fly perk planes or why this has even become a debate in this thread. If you buy the plane to fly, the price shouldn't go up in flight or down for that matter, that's bogus. It's not valid to justify this by saying you shouldn't be in the plane in the first place. The OP asked a pretty reasonable question. I remember when I first started flying Aces High years ago I couldn't wait to save up for the 262. It was a side goal to be able to fly that bird, and when I'd die in it, I'd have to save up for it again. It was quite fun, but of course, just a phase until I learned the greater aspects of the game. So shouldn't it be fair for those pilots that can't rack up thousands of perks at will in high eny planes to be able to get the perk price agreed upon before take off? I don't see what the big deal is.