I've "heard" that the centerboard version sails well too a bit "tender" but thats subjective, it took up too much room, again subjective. (early 33ft versions) I don't know, wouldn't hazard a guess.
I'm owner of 1980 Freedom 28 Cat Ketch. Centerboard model.
F28CK is identical to F33CK, just a bit smaller. I believe that centerboard model is acctually a better sailor than fixed keel model. It points better. However, centerboard takes a lot of space inside, and it is pain in back to operate.
Boat is well built. It's a good boat for distance cruising. Lots of storage. Easy to sail. Boat is fast at any angle going downwind. It's not exiting going upwind, it will take you where you want, if you know how to sail, but it will not give you a trill typical for upwind sailing...
Boat is different in many aspects than most sloops. She is much quieter underway, making false impression of "nothing happens"
Sail handling and ajustments are different too.
Most boats already converted to "normal" boom/sail track/single ply sail. If not, such conversion is due and should be reflected in sale price.
Hoyt/Parris Freedom 28/33 Ketches were built as go anywhere boats and, I believe they are such boats. They are not daysailers/weekenders. There are better boats for weekends.
They are old boats. They have sandwich construction everywhere which is a big problem. Most likely, there is some water penetration into core. Good surveyer is good idea.
Carbon fiber freestanding masts are showing their age too....
Pricey as well
There are two groops at yahoo.