outboard

Need to replace power on my fresh water striper boat- Glassmaster(1971 20’trihull with bracket) Tired of 225 efi merc. Want to go with 250/300 2 stroke yamaha long shaft 2004 or newer. where is the best place to shop for good used motor? any help would be appreaceted. Sold one of my offshore boats today and have some cash? need one this month. call me I dont do E mail well without mamas help.864-350-8211