This Agreement constitutes a sale of certain assets of Seller only and is not a sale of any stock in any entity comprising of all or any part of the Seller. Learn the tax implications for each type of sale.Once you have a general agreement with the buyer, the buyer usually drafts and signs a non-binding letter of intent. ASSET PURCHASE AGREEMENT between SHIRE LLC and TRAVIS C.MICKLE, PH.D., AND KEMPHARM, INC. Asset Purchase Agreements (APAs) are essential documents for asset sales, but they're far more complex than a simple transaction.