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Just don't make your links look like cheesy third-party banners, and don't be shy to take all credits for finding best deals for Your Visitors.
It has a picture of the product, the price, and a "buy now click here" type of text on it.
The reason is this - somebody searches for a product and they find your site in the top results. They come to your site and have no interest in reading the text, they just want a quick link to buying the product fast.
It works very well for me.
I then put a few text links throughout the article, and then usually display the buy image again right at the bottom (or a variation of it).
Whatever you do, try and make sure you don't look like you're "selling it to them". The last thing the potential buyer might need is a salesperson attitude, it could put them right off. Be their friend that is giving them a lucky tip, that way you could get a few more conversions.