There aren't?
The 306 (and prior 290) is, I think you'll find shortly, one well-loved boat. It has enormous room for a 30', yet the cost and handling make it a very manageable boat. Have friends with a 28.5 who couldn't believe the difference in size. A lot of boat.If the cost is right, you'll like what you've found. Check the owners reviews, including the 290.Paul