I'll third Bill Harris. I've greatly benefitted from his contact and advice, which he shares unselfishly, and I've never bought or sold a boat through him. If you like laid back, informative and no push, he's your man. I think I've got his marina number but only on a PM.
Regardless, you are in the best place in the east to see a real assortment of trawler style boats. Stuart is a real maritime community with generations of families in boatworks and gobs of cruisers. That's why I'm docked in Stuart for upgrades and improvements right now.