The Aztec is a great twin, maybe one of the best - all most built proof, benign handling, amazing load carrying and bags of performance in other words all that is missing from too many light twins.
However they are old designs; transforming most into a top draw aircraft will cost.
In short for me it depends what you want. Spend 100k on almost any aztec and you will be close to a superb twin, spend 50k and it well be tired but serviceable, but which ever suites you may very certain you know EXactly what you are buying, there is really no substitute for a comprehensive survey from a reputable company.