Dear Sir/Madam,
I would be delighted to undertake your project. I am a native English speaker in the United Kingdom and use eBay to buy and sell regularly. I can promise you a first-rate service as I have experience of proof-reading for scientific journals as well as presentation of several sites, and I have taught clients in different fields to interact with various software and websites. I hope we can work together, as this will be my first project on freelancer.com, and I am prepared to complete some form of 'test project' in advance so that you can be sure of the high standard of our work.
Also we are proficient in Photoshop, CSS, Javascript (and various javascript graphics libraries) so any enhancements of your site won't pose a problem.
I was a little confused by the project details, however, surely you aren't offering as much as $5 per product?
I look forward to hearing from you,
Yours faithfully,
'CleanCoders'