How to determine termite damage?

[Dennis Tierney]

We have a 9 building property under contract and the termite inspection has found that one building has been treated in the past but the other 8 and the garages all have evidence of untreated termites. It appears the seller has chosen willful ignorance in treating one then failing to check the other 8. So how do you determine how much structural damage has occured while he looked the ohter way? I doubt he'll let us take the walls apart in each building to assess damage. All the buildings also have evidence of ground water problems that have been minimally addressed. I may just end up walking away. Any suggestions?