Are the cabinets in good shape or would they need to be replaced at some point in the near future? If they are in good shape and the color is just out dated painting them will be a cheap way to freshen things up. I would skip changing the counter top though since most people who buy a house will want to change things anyway to add their own likes and personality to the house. If the counters are in tough shape though you could go with a cheep new laminate top just to make things look better. Good luck in your project and I hope you are able to sell your house quickly.