Interested in locating/ purchasing 1970s vintage or maybe 1980-82 Hatteras 46 Convertible.

Those for sale on BT & Yachtworld seem to be in 'average' or below average condition...
Appreciate any tips on what to look for, other places to source these boats etc.

Open to possible repower as well - guessing 46C would need QSM11 or CATs.
Not interested in MAN, MTU or Volvo.

Many thanks John