What's your point? Either way we're adding up largely arbitrary line items composing a very small minority. It makes more sense to look the areas that would impact the most people. To use your analogy, who cares if the seller takes care of that $40k line item of the other ones that need work add up to $250k? Great, I have a solid roof but what about my crumbling foundation...
55k/7m = 0.8%
7m/170m = 4%
There's a legit difference between arguing about a $40k line item on a $1m house sale and a $400 line item.