Bonita Resort & Club, Bonita Beach, FL. Older construction (1980's ?). Concrete building, not at all a "fancy" place.
Fewer than 30 units in total, well maintained and seems to be well managed. Small pool. Situated directly
on Estero Bay, short walk across the street to the Gulf beach. We really liked this little place. A unique feature is several resort-owned pontoon boats on site which can be reserved a day ahead for half-day use, at no cost other than a $20 refueling fee. Lover's Key State Park is also a gem, located about 5 miles away.
I'm guessing that this place might be very difficult to "exchange" into, dunno

.
We were not there as "exchangers".