Does Homepath ever take less in first 20 days?

[Nicole Thomas]

A property I like has 1 offer but they listing agent said I can still put an offer in because it hasnt been accepted. House needs a great deal of work probably close to 100k. 

I am making an offer contingent on inspection. Thinking about offering 15k less than asking. 

I would hate to lose the house over 15k. I was going to offer full price all cash. And during inspection if there is anything major like the septic or roof or water issue, I was going to negotiate for money off.

Does homepath negotiate after accepting a contract if a major problem is found that you cant see with a regular walk through?