I'm trying to sell my iMac and have posted it here as well other sites. I received an email response from my Craiglist posting stating that blurring out the serial # made my listing look shady and like "spam". Obviously that is not my intention, and blurred it out just for "safety" reasons. I'm not sure what can be done if I show that info if anything at all, and if it is completely safe then I have no problem showing it? What do you guys think?