Many sellers ask me if they should renovate before lisitng their home for sale.
If the entire home is in original shape, and you don't intend to renovate top to bottom, I would leave it as is. That provides the buyer with full rein to choose all new colors and textures for every room - which also creates a cohesiveness throughout the space. If you just renovate one room, like a bathroom or bedroom, the stark comparison to the rest of the home makes it look worse - and more work.
Sometimes a buyer won't purchase a home if the reno is brand new but not to their liking.
However, if your home is in good shape but the bathrooms are tired looking, overhauling those would be a good idea.
The best mini reno on most places is always a fresh coat of paint - done by a professional! A neutral white or off white is a great choice.