Repairs as Negotiation Tactic

[Kelly Williams]

Does anyone have any experience waiting to do necessary repairs to a home to utilize as a negation tactic?

 For example:   I recently sold a single family home.  I was aware that the roof needed replacement, and in preparation to put it on the market, I replaced the roof.  After receiving an offer, the buyers tequested to have numerous smaller issues taken care of after the inspection.  In hindsight, if I didn't replace the roof beforehand, I believe that would have been the only item that they would have requested fixing (because it is such s big ticket item).  

     I am asking because I am about to sell another property that needs a new septic system.  Should I wait to replace it?  Or get it over with and go ahead and do it?  Thanks!