how to best link related eccomerce sites

Discussion in 'White Hat SEO' started by Horatio, Sep 12, 2011.

  1. Horatio

    Horatio Newbie

    Joined:
    Jan 20, 2009
    Messages:
    18
    Likes Received:
    1
    I have 4 websites that sell similar products (each has a different emphasis, not all products are the same).

    What is the best way to link these sites?

    In the past, I had footer links from each site/ to each site.

    One site is PR 4, Two sites are PR3, Last site is PR1.