Unless you are listing something as a SALE, do not drop the price. Standard retail that I was taught is to charge 185% of wholesale, or more. If you are trying to get rid of inventory then raise the price and list it as "Few Remaining". Unless the cost is significant~list the price including shipping, not separately.
I have not seen an Amazon link for your products. Using these links will get you credit for anything bought as long as that link was used to get to Amazon. You'll have to have a sales account with them. Have the link go directly to the product relevant to that topic or page
There are three links at the end of all your initial topics. Add another for Amazon and use their logo to do it. It can be the same font size as your current links. Just make sure it is always one of these links. Use as many META Tags/Keywords as they allow and be creative with these.
Get people to write reviews of your products they buy, as the more reviews the higher the listing.
Your Permies.Com logo is on the top left of the page. Put links to your products on the right side in the same size font. ex: Amazon, Vimeo, any product you're drop shipping or selling directly from inventory. One to three links ~~Don't go overboard here, clutter is not good.