I very interested in buying a built 2006 Z 601 XL which is registered E-AB and have many questions. Does the E-AB registration transfer to the new owner upon sale? The real questions is; does the new owner have the same inspection and maintenance privileges as the original owner? There is no POH for the aircraft of interest; can I get one from Zenith Airraft? This aircraft has a Corvair O-164 engine built by the aircraft builder per Wm Wynne's conversion manual. Can I get a maintenance manual from Mr Wynne? The builder does not have one. This aircraft is flown in the "heartland" and has no transponder. I welcome suggestions for an affordable used or reconditioned transponder. I have seen a KT-76A in Trade-a-Plane for $695; is this reasonable? or are there better choices? Should I have a certified A+P inspect the aircraft before I buy? How is the Airworthiness Certificate updated or renewed?. This novice buyer has many questions and needs HELP! Advice is welcomed!