FloridaLeisure.com has some very nice properties, and he's been around for a long time (which is a good sign).
Be sure to read the post about Families First. I'd be sure to mark them off my list.
Another good choice in
www.vrbo.com (Vacation Rentals By Owner). There are some wonderful properties at excellent prices on that site.
BUT I feel the need to add a disclaimer here. I recently booked a home in San Antonio through this site at the last minute. It was a beautiful 2 story 5 BR, 3 1/2 bath renovated ranch house on 30 acres of land.
We loved it until we got ready for bed that first night and a scorpion came under our bedroom door. My DH and the other family's DH killed it. We decided it must have gotten in while we left the doors open to bring in all of the luggage.
The next night we found two more just at bedtime. We decided to leave at that point. We called the lady who managed it, and she came over. She was very nice and returned our checks (while keeping the deposit), but we wound up paying way too much for hotel rooms, because we had to find something in the middle of the night.
My main point here would be that since I booked at the last minute, they didn't ask for the $500 deposit (I only paid $100). This lady was very nice and not a problem to deal with, but it did occur to me that the situation could have turned out much worse, and I could have lost more than $100.
While I may use VRBO again, I'll only use someone who takes credit cards, so I have the ability to file a complaint with my CC company if there's a problem.