Aerohack gave some good advice.
Old Bonanzas and E185 engines are best appreciated in a museum. Best to choose a model from the mid-60ies on, with a more modern (?) IO470 or IO520 engine.
Also the model 33 is less critical regarding W&B than the model 35.
Balancing the ruddervators is very critical, serious flutter can result from improper maintenance of these parts.
Also check the Bonanza Safety review by ASF/AOPA.
The Bonanza is one of the best GA airframes, but choose a more recent model 33 or 36 (at higher price). Postponed or neglected maintenance items can be very costly to rectify. A prebuy inspection by a knowledgeable mechanic is essential.
From the American Bonanza Society you can order 'Flying the Beech Bonanza' by John Eckalbar, and Service Clinic By Norm Colvin.
http://www.bonanza.org