That's what I was thinking too. It would be very difficult to get them out of the country- so why steal them? Just seems odd to me.
Probably to part them out. Some of these thieves are really just dumb meth heads.
Look at those two yahoos that stole those three Tillamook Cheese VW buses.
Not really that difficult to ship boats out of the country. When I lived in CT, a dealer had a 32 foot cruiser stolen and ended up in Greece. The boat was put into a container along with a few other stolen items (pool table, an RV and a Ferrari).
Not hard to resell at all. But the main prize are the engines. A typical 250 hp outboard motor today is worth 10-20 grand and they are very easy to resell into the gray market.