Well, you said you wanted a boat that was "fully outfitted" at $5,000. I don't think any of the above could be purchased and made ready - fully outfitted - for $5k. Those are the type of boats to which I thought you might be referring; These boats will take more than just effort to be ready for a 1-2 year voyage.
At any rate, my original post was not meant to argue purchase prices but to get you to think about the real costs of owning the boat over that time period. Speak to a boat broker and ask what would need to be done to those boats to make them ready and then add up the costs. Sails? Engine? Standing rigging? Running rigging? Electronics? What about structural work... rotten deck core, ugh, that was the killer in my search edging out engine replacement.