As others have said, the purchase agreement should have a jurisdiction where the business will operate, which is where your business attorney should be practicing. It seems like that should be the same state as the seller in most search scenarios. This would only come into play if there's some conflict over the purchase agreement.

Agreed with the above. Jurisdiction relates to where a dispute will be resolved. While the term is negotiated, it is often far down the priority list (which, in my opinion, it generally should be). In fact, the applicable law is usually a much more impactful consideration. I have drafted agreements as well as litigated these issues many times. Happy to discuss if you have a specific concern, but focus much more on business terms.