Here is one:
http://www.boattrader.com/listing/2001-catalina-310-103037902
Fresh water boat, I would look at what attributes you are looking for such as low engine hours, Air conditioning?,
One owner?, reason for sale?,age & condition of sails, manuals, how well maintained, who maintained?, winter cover?, bimini/dodger?, have the boat surveyed.
I have nothing in this, when I find the other one, I will send that your way also.
We found ours at Kentucky Lake-Green Turtle Bay in January and it was looked at by us in February.