Your real estate agent probably has a list of contractors who could give estimates for the repairs that need to be made.
When you have done your homework, make a discounted offer based on deductions from list price for the repairs. Include copies of the repair estimates contractors have prepared for you.
Be sure to get a professional contractor to give you an estimate of charges for the items that need to be brought up to code and replaced, if it is an "as is" property from a bank, you do not want to invest in it if you can't bring it up to your standards. If it's a regular resale home by the owner, you can request the repairs be made. If you can't come to an agreement, walk away it's best to be safe than sorry if you get stuck with problems.
Selling a property "AS IS" is a fairly common event these days.
Our recommendation is to make your offer based on an amount that would include(reasonably) consideration for the upgrades and work required to bring the home to your standards.
In the event you are now working with the listing agent as your representative, don't expect to get too much support. Whether it's this home or another down the road, consider getting a buyer's agent that will represent only your interests and avoid the doubt of a "conflict of interests."
You CAN buy it AS/IS and piggy-back a Fix-Up loan so that you can control the work that is done.
I can refer a good Mortgage Agent.
I was amazed at the difference between an old A/C unit and a new one: The new ones can not only cool better, but the cost to operate will drop by 75%!
good luck and may God bless