The provisions of this chapter do not apply to transactions conducted by the following:
(1) Motor vehicle dealers licensed under chapter 46.70 RCW;
(2) Vehicle wreckers, hulk haulers, and scrap processors licensed under chapter 46.79 or 46.80 RCW;
(3) Persons giving an allowance for the trade-in or exchange of secondhand property on the purchase of other merchandise of the same kind of greater value; and
(4) Persons in the business of buying or selling empty food and beverage containers or metal or nonmetal junk, in compliance with chapter 19.290 RCW.