I have spent many wonderful days at San Andres Island and its 2 nearby keys. It is a free port and bargains still exist. Unfortunately the last 2 times I visited, I saw drugs openly sold on the beach and on the streets. Drug dealers openly approach tourists and display and sell their wares everywhere. Sadly I do not recommend visiting it to anyone anymore.

Rumors are if you piss-off some dealers, they will have a hotel or airline employee plant drugs in your luggage, inform the USA DEA you are smuggling drugs and collect a reward. You collect free room and board in a USA federal prison. Worst case is if they inform the Colombian equivalent of the DEA. Colombian jails are really draconian and Colombian prison sentences are repressive.