The real problem area is the land in the corp, and the sister wanting to "retain her share", as compared to being bot out.

The growing or harvested crop valuation is a pimple on an elephant's butt........merely a negotiating point for settling the land issue, since there is going to be real problems with that corp-owned land that they want to hold as land, and try to get any stepped up basis that followed the stock valuation.

If I were on the sister's side, I would be focusing a lot of attention on that crop valuation non-issue, just so when she asks for the corp as is..........the "buddy" and his attorney will be worn down and easier to deal with.

In addition, if the crop was being produced jointly outside the corp, then they have partnership agreements/rules/returns to contend with..........and unfiled partnership returns are in the top of the hit list of IRS right now.

Lots of issues that are not apparently being dealt with.........otherwise the "buddy" would be talking about those, as compared to the crop valuation.