Hi there. I've just had a look at your e-bay ad, but would never had found it if you hadn't given your sellers name. The idea is good, but it's in the wrong section. Collectables is for, as the name suggests, items for sale to collectors, hobbyists etc.
My suggestion would be that you set up your own website with details of the types of effects that you can offer. You could then include a portfolio of your photographs on the site. If you contact several of the local newspaper groups and talk to the advertising depts you could take out small ads giving brief details of what you are offering and include your phone no and e-mail address in the ad.
To keep costs down you could try out your local paper first. You're more likely to get some interest from locals than you are from someone at the other end of the country.
Cards in shop windows, post office etc can also pay dividends even if you only get one or two replies. If the product is good then word of mouth will soon get around.
Don't forget that most people with digital cameras have some form of digital editing software, so you maybe need to be looking toward the non pc user market.
By the way I liked the examples in your advert. Good luck,
Richard