The provisions of sections 13b-39a to 13b-39d, inclusive, shall not apply to military aircraft or government aircraft owned and operated by the United States or any state or local government therein, to any aircraft registered in a foreign country that has a reciprocal agreement with the United States government or to aircraft engaged in Federal Aviation Regulations Part 121 and Part 135 certificated operations or to aircraft owned by dealers for the sole purpose of sale or exchange. For the purpose of this section “dealer” includes any person actively engaged in buying, selling or exchanging aircraft who has an established place of business in this state and who may, incidental to such business, repair aircraft or cause them to be repaired.