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It only has pr5 but I was thinking of placing some keyword rich links on it (they are relevent as its the new site for same company)
Might also use it to practise a few new seo tactics but there must be other things to do with it?
any ideas or suggestions welcome?
Go sign up for some affiliate programs, and place those links on the site.
Judging by the theme of your site's topic, I bet you can find quite a few affiliate programs that will make you money off of that site.
Why sell it for 50 bucks now, when you can make 50 bucks a month off of it?