hello tuppence03
You need think carefully before breeding. Have you been keeping them long?
The leopard gecko market is very competive. You may not make a profit and you may not be able to sell them..
If you are still set on breeding them I'd go for a more exclusive morphs, but you'll have to spend out a little. Enigmas seem to be going well at the moment. Make sure you get a linage (to prevent inbreeding) and get them from a reptuable source.
You could always go along to a show to see what morphs actually look like and what is selling.