The trader fees on this forum are ridiculously small for the amount of business can generate, if the services and products you offer are promoted consistently, at just £55/year. I'd be happy to pay that per month without hesitation. As others said, trader fees should be raised, even more now when we've been told we have a new server, new site etc. That must cost quite a lot to rent / maintain. I speak from experience as we have a few colocated servers.
My advice, of course, if you allow me, is to be a bit more active here, post at least once a week with lots of photos and videos of your work, doesn't have to be 350z or 370z. Members are looking I guess for trim quality, leather colours and options, stitching styles and so on.
I'm here every day and I quite forgot about your services until your recent thread with the green seats. Funnily enough I was look for similar services for my two Jeep Wranglers, so I'll be in touch soon, once they arrives in UK in August. If new members don't see your threads, you can have the best services and the cheapest prices, they won't find out about it, so they'll go to Jack Royal by default.
Hope this helps.