I have 435, basically a 90% scale model of the 465. 465s and 435s hold their value well, no fundamental problems that I've experienced or heard about other than the standard issue
furling gennaker which is more trouble than it is worth. Like most
boats they suffer from problems with ancilliary systems such as inverter/charger failures and general
electrical peculiarities.
If you are going for a 465 I would say to make sure it is the Easy
Cruise version. They have 3 foot extensions to the transoms making them 49ft overall and also most extras that you would want were included as standard...
generator,
watermaker etc.