Great double sider!
I picked up the 861 release originally with 'If' on the flipside. It is a completely different version of LTFKY and not really northern. 'If' is quite a good doowop sound.
Subsequently bought the 961 release, paid about $50 for mine (also a mint promo) off ebay about 2 years ago. I'm sure this is £150 in one of the guides, though realistically it's probably about a £50 record.
ATB
Jon