As a general rule of thumb the more higher your content is placed in the page source, the more accessible it is for search engines. This ensure they correctly pull the right page info and meta data.
Taking a quick glance of your source code, I definantly think your externalise all JS in a single file to remove the amount of bloated code which currently exists.
Also two more things:
(1) Further optimise your page. More people would search for multi color function printer than a refurbished printer. Make sure you conduct keyword research for all product pages.
(2) Even though this is not as important, none the less reduce the number of h2 & h3 heading tags you are using, particularly the links with the headings in the "supplies and accessories" section as it is not necessary.
Hope this helps,
Vahe

