If you are selling Doctor Who merchandise, there is one thing you should use to make sure your item gets the best possible amount of potential buyers.
The thing with Doctor Who is the Doctor part. People type either Dr or Doctor. SO, a common idea is to put both in your title. For example, 'Dr Doctor Who Marco Polo DVD' So more people can see your item.
Although it may not seem like much, it has the potential to raise a few pounds if you're lucky. Use this method and you will be sure to increase the amount of buyers.