Like others said, CraigsList and Only Inboards. I just sold my Saltare last night and the buyer found me through CraigsList. You definitely end up with a lot of tire kickers via any free internet ads.

Facebook for sale groups are highly active, but since you;re self admittedly "older" ("at this age", etc"), that may be unattractive to you. Facebook groups like "Ski and Wake Boat Liquidator" and "Wakeboats for Sale" got me a lot of attention, but no buyers that showed up to my house.