I wish I had a better bathroom in my house and I know that no one has ever passed up on a house because the bathroom was too luxurious! So the bathroom is a great place to put in a little extra effort to get more value from the house and get it sold.
If you can provide some natural light into your bathroom thats a real plus with buyers. Mother nature rocks thats for sure. If you can, add a skylight. It will make the space more comfortable and luxurious adding ambiance.
Putting in a more luxurious showerhead is another big plus. After a long days work a shower hits the spot and if buyers can see themselves being able to wash away the day in the shower thats a plus.
Make sure you accessorize the bathroom before you show the house. Put in some fluffly bathtowels and plush bathroom rugs.