A home that is in great shape both in and out, and that offers the any upgrades buyers are looking for is always a plus.
Upgrades depend on how much you plan to spend and most importantly what your return rate will be on those upgrades. What is the current value of the home? will adding upgrades increase the value? is it worth the cost and return rate? These are questions you will have to decide on prior to doing some renovations.
On the other hand, if the home is already in great condition and offers some extra features, you may not need to spend on major upgrades. Usually minor cosmetic repairs will do, ie., painting the home, repairing minor details, staging the home, removing excess furniture and personal belongings, keep the home fresh and clean, bright, remove animal scent (if applicable). Remember you also have buyers that wish to buy a home as is -- come in and make their own upgrades and renovations, at a great price purchase price. Best of luck