I am currently in Marina Seca, San Carlos Sonora, Mexico. It is a good yard with great facilities for working, stowage, launching etc and it is cheap (store a 38' yacht for $150 per month in a very secure yard).
There are many yachts here for sale at bargain prices. Keep an eye on Yachtworld, contact the marina direct for boats which are being sold to recover storage costs and make your requirements known to Sea of Cortez Yachts.
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San Carlos, Sonora, Mexico Forums
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Sea Of Cortez Yachts (San Carlos, Sonora, Mexico)
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Marina San Carlos
It is absolutely a buyer's market. The sheer numbers of inexpensive boats here for sale is mind boggling. Having said that, you will not get an ocean ready, nothing-left-to-do style of boat for $10k. But, for that sort of money you will find some good well found boats which need a bit of elbow grease and a few dollars to turn into comfortable, safe inshore cruising boats.
The Guaymas Port storage marina and Marina Real also have cheap hardstand storage.
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