In Naples there are several yacht companies and brokers that offer yachts for sale or charter. Here are a few reputable ones:
Galati Yacht Sales
1490 Fifth Avenue South
Suite 104 Naples, Florida 34102
https://www.galatiyachts.com
Allied Marine 1945
909 10th St. South
Suite 102 Naples, FL 34102
https://www.alliedmarine.com
Marine Max
1146 6th Avenue South
Naples, Florida 34102
https://www.alliedmarine.com