Without knowing all the details involved, it would be hard to pin-point exact details as to what is happening. I was not able to pull up the url in question (gopink.com). I did a whois and it's currently being held (as you're aware since you are going to bid on it).
It looks like they could just be doing a redirect to that page so that they can pick up the
PR of that site, and then sell it at an inflated price. Remember, once you buy a domain, Google resets the
PR back to "0", regardless of what the previous owner had for the site.