Good thread, we want to sell here in a couple of years, too. Relocate to a smaller home, somewhere less expensive...... Like the OP, I am trying to make decisions that make sense with this in mind.
My biggest expense, that MUST be done, is the flooring in the entire house. We have the 16 year old, light beige, builders grade carpet that came with the house when it was new. 4 kids, 3 dogs, and a few cats later, it is SHOT! The dogs even chewed out patches of it when they were puppies (it was already trashed by then anyway). I think we have to do all hardwood on the first floor to get this house sold. I am undecided about the 2nd floor. I am leaning towards all hardwood though. I think any carpet we choose may not be liked buy a buyer, and who knows they could have allergies. I think we can keep the floors ready to show a little easier. What an expense.....
I have white (worn) kitchen cabinets, that I think I can paint. If not, just new doors......