Basketball Cards Upper Deck

Hi,

I was searching through my childhood things and came across a basketball collection that I had. I have some rare Michael Jordan Cards where is wears the number 45 Jearsey. I got this card from a Imported Magazine. I live in SOuth Africa and I have no idea how to discover the value of these cards. Could you assist me with this. My email address is werner.leithgob@t-systems.co.za

Thanks