yes it worth #300 without PR, but I can bet in $300 that is valid PR3
Once again, if you want to test is pagerank valid or not you should type in google:
info:domainname.com
If show that url it's valud pagerank just like here:
http://www.google.com/search?client=...utf-8&oe=utf-8
and here is one example how it look if it's fake PR:
http://www.google.com/search?hl=en&c...&aq=f&oq=&aqi=