Stats on my first affiliate page, and where to focus from here

I've been only very slightly dabbling in the IM world off and on for a few years now. I'm inspired now to make a bigger leap.

I have a single page that I made years ago that:

- Links to a single product on Amazon
- Gets about 88% of it's traffic from organic search, and about 12% from referrals
- Has been #1 in Google for years when you search the products make/model name
- It gets little traffic, usually around 30 uniques/day, but have seen 200 at times

I realize this is a tiny site, but since it's established it seems like a good one to start experimenting with. So I'm looking at the stats, and trying to make sense of where to focus.

In a sample month, I see:

Sessions: 1,120
Click through's (to Amazon): 581
Unique Visitors to Amazon: 491
Total Items ordered: 13
Conversion Rate: 2.24%

The sad thing is, only of couple of the purchases were the item I'm promoting.

From what I can tell, my click through rate is really good, but the conversions aren't. Since I don't have control over the Amazon page, where should I be focusing my attention?

FWIW, my page makes it very clear what it's about, and has two buttons that say 'Clear here for the best price', which are the ones that lead to Amazon.

Thanks for any guidance.