The three most important and repeated words when requesting info here? Search, search, search....

A lot of your issues have already been discussed at length. For a start, search on the following topics: rust, wagon prices, SLS...read what you find there and come back with your tough questions.

FWIW, 4k sounds a tad steep but for a really well maintained example with NO, ZERO, NADA rust, it might be an acceptable price.

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Never a dull moment at Berry Hill Farm.