I ported my last set around 2008. Because of the magnum engines becoming cheaper and magnum heads and repalcements available cheaper the market went away. I haven't even been asked about them personally in years although they do still enjoy popularity on the web. I think it's more a question of what you can get for them vs what you put into them. Someone will always buy them - question becomes is it worth your time? You can get good numbers from them - how much time do you spend and is it worth anything to you?
