The problem exists in a couple of these texture packs, actually. The ZGroovy Variety pack is another one that bumps the default 150K price of a Cobra MKIII up to 230K, which is probably what gsagostinho used as the basis for his addition.
The origin of those numbers, and their increased price, was the idea that it was intended by the original author that these special paint jobs would be rare, and that the player would need to buy the paint job as a brand new ship in order to get them. Then I come along with my Respray OXP and undo that whole premise, so maybe some of the blame lies with me.
I've put a simple fix together: download this oxz (NormalisingCobraMKIIIPrice.oxz
) and put it in your AddOns folder. This overrides the price of all the ZGroovy and gsagostinho Cobra MKIII's, returning them to the default 150K price. If it works OK I might merge this into the next Ship Respray release.