If the equipment works, all the money is returned to the seller. If repairs are required, then appropriate deductions are made. In the walk-through process there are some cautions for consumers. Walk-throughs generally occur just before closing. For new homes, be aware that builder contracts often prohibit the establishment of escrow accounts for work which is incomplete.
Photographic records can be important.
Photos or videos of an existing home made during a home inspection can prove what was or was not in place, what was damaged or not damaged, etc. Be sure to get permission from the owner before taking any photos. Know what your contract says. If an item isn't covered, you may have little leverage. Be aware that a walk-through can impact warranties.