Hello Rich, It seems that you are inquiring about a cosmetic repair on the home. If this is the case, the current market is a sellers market. Most homes come as is if the item that you are requesting to be repaired is for mere cosmetic reasons. I do recommend two thing: "a good and aggressive realtor to request repairs in the home, or credit towards the repair"and " a really reputable home inspection company". If the item in question is not in working condition, you should request a repair. Most properties that are foreclosures or short sales are sold "as is". Just remember that if you were competing for a home with several offers, the owner will most likely not repair the requested repairs and may chose to reject the request. If this happens he will know that he can get another offer. I work with several investors, and sell homes every single day. I have seen my investors factoring their cost of the repairs already when they buy the home. Again, just based on being a seller's market. Make sure your realtor discuss warranted and not warranted items when it comes to requesting repairs too.
Good luck :)