It is old domain name but it was never established so it has no backlinks and other important factors. The domain name itself is worth good amount only because it is three letter .com domain name. However, buyers for these domain names are from China and market around it. I haven't researched why they do like numbers in domain names but they use them a lot and they got sold for a decent price. So go on and research auction options for Chinese market because this is where is market for this domain name. As historical domain it doesn't mean much: http://mcjonline.com/www/r09.com