Hi, I don't expect it to sell with high price because the site is not zero work, you need to write review and promote the review so it will not sell high like adsense I think.Nice listing , you said that site is generating 300 - 500 $ , then why you are selling it in low price ?
With my own first listing in early 2010, I sold the site for $1,000. The site was not even making money. No traffic. I had unque content for the site, good designs and good niche.
For a site like yours that is making at least $300 per day, I will not sell it for a low price. Like I said, if you get more people really interested and bidding on the site, you may even sell it for more than $5,000. If not, the price may not be worth it.
just notice there is BIN price as there are some buyers do not want to take part in the bidding wars, they want just buy it over instantly