When buying or selling an RIA practice, one of the most important documents you'll encounter is the Asset Purchase Agreement (APA). Vendor's wishing to submit bids electronically should click on the "Vendor Registration" link to register for electronic bid submission.Matthew Collin's practice focuses primarily on mergers, acquisitions and other transactions involving public and private investment management firms. Purchasing Mission Statement. Our mission is to provide guidance and leadership to District educators, staff and.