Section 372.045 - "Purchase" defined1. "Purchase" means any transfer, exchange or barter, conditional or otherwise, in any manner or by any means whatsoever, of tangible personal property for a consideration.2. A transaction whereby the possession of property is transferred but the seller retains the title as security for the payment of the price is a purchase.3. A transfer for a consideration of tangible personal property which has been produced, fabricated or printed to the special order of the customer, or of any publication, is also a purchase.