IMO it looks professional enough to get you conversions. It certainly shouldn't scare anyone away.
It loads fast, navigation is straightforward, and I like the tables. I also like that your home page is essentially FAQs. It works better than a piece of fluff opening page which requires an extra click to get actual information.
Two suggestions: maybe a picture or two would be nice, as it looks a little plain; and I would watch your keyword META, as they say repetition is bad - you might be better off with "dell coupons" and then single words.
SEO people, what do you think?
CiCi