Who ever buys the website will face that problem, unfortantly "the quick way to promote a site costs money"
Having videos on youtube with links to your site having facebook pages, google pages or twitter are all ways to get your self noticed, you also need to find a way to target the market, Is Sign printing or painting somthing your seriously into? if not then you will struggle to market it.
I firmly believe if your not interested in your own product it wont sell.
I went for a job interview about 5 years ago for a carpet cleaning job before i qualified for IT and i promise you it was the worse job i wanted and i knew it before i applied but the bloke who interviewed was so proud of his company and enthusiastic about the "cleanliness" of his carpets i couldn't wait to start once offered the job!