An action on a contract under the provisions of this act shall be commenced in the county in which the contract was in fact signed by the buyer, in the county in which the buyer resided at the time the contract was entered into, in the county in which the buyer resides at the commencement of the action, or in the county in which the goods purchased pursuant to such contract have been so affixed to real property as to become a part of such real property.
69 P.S. § 2205