It is something I have thought about in the past. However, unlike a lot of other websites where there are various people running things, I'm the only person administrating this website. Taking on a project such as selling merchandise is not something I would like to do on my own. You also have to take into account how much it would cost initially if you were to start selling Oscar fish lover merchandise. T-Shirts for instance would need to be fairly good quality. You would probably be looking at around £5 or £6 each before you even sell them on. One of the other Oscar fish websites has merchandise with their name on it. I've no idea how much they sell. To make it worthwhile, I think you need to know that you're going to sell enough merchandise. I haven't got any plans to start selling Oscar fish merchandise.
If any members are interested in designing merchandise and selling it, let me know. Funding a viable project is not a problem, Manufacturing the merchandise is something someone else would have to do.