I am a SEO student, I will be able to submit your website to search engines and give you an analysis of your websites. You will be able to identify the strengths and weaknesses of your sites with our professional reports. Submission to search engines and reports on your website is very simple if one has the correct software. So I don't charge you for this service. My quote is a monthly quote which is for advice and link building. Link building is a must for SEO, this must be constantly attended to, to achieve high SE rankings.
If your downloading site is targeted for youth (games, music etc), I do have a marketing technique which could help you. Obviously this depends on your product that you're selling. This will require an additional quote.