Depends on the budget. And it also depends on what's "wrong" with it.
You covered the obvious minor things: Paint and carpet.
And you know that the things that'd really sell it aren't minor: New kitchen and bath.
So, the question is: Beyond paint and carpet, what do you do? And that often comes down to: What needs to be done. Take a look at window coverings, for instance. Maybe consider replacing interior hollow core doors with 6-panel doors. Get rid of the popcorn ceiling (if it has one). Then selectively address the bath and kitchen. For instance, in the kitchen consider replacing the hardware. Maybe--if appropriate--paint the cabinets. In the bathroom, maybe replace the older medicine cabinets with new ones. Look at the lighting fixtures, especially in the bath, and consider replacing those.
Clean and declutter. Make sure that the accessories--pictures, plants, etc., are all contributing to a specific "look and feel." Make sure the furniture arrangement best emphasizes the condo's strengths, or doesn't call attention to its weaknesses. (Overstuffed chairs, for instance. Particularly in a smaller room, they can make the room feel smaller.)
Hope that helps.