$4300 seems steep for both of these era boats, since if they are 'original' they are going to need a complete going-over anyways and in _the least_ the replacement of all throughhull/seacocks and cockpit
drains. Also many times things such as standing blocks, rudder
mounts, and other important hardware
needs replacement/rebedding in the least.....and possibly replacement of even more expensive parts
such as the rudder
itself if its 20+ years old. In other words, despite how 'nice' or clean the boat may look on the outside, if its old there are guaranteed a lot of things aboard that need replacing if they are 'original equipment'.
In today's market $3500 should be more than sufficient to get a nice example of either of these boats, trailer included. Add to that the cost of going over the boat for the above mentioned items.