My stance is - do not worry about competitors - be happy - it proves there is a market there.

In truth, as long as your product is at least slightly different to your competitors then your customers will be happy to buy both!

If you think about any hobby you're passionate about, do you just buy one book on the subject and leave it as that? No! You buy multiple books on the subject because you are craving for more info.

Its the same online, as long its not the same, people will be more than happy to buy it.