I have a late 2013 rMBP 15". Of course the cord on my power supply is frayed so I bought a new one from OWC - Other World Computing. It was on sale for $39.99 - normally $49.99 (without the extension portion).
When I got it I see it is used. I check the receipt, it says used. I don't recall the web page saying that, and now that sale is over so I can't check it... but I'll concede it may have said it was used, I wish that detail was more prominent, but maybe that's my fault. Any way...
I noticed the Mag Safe was bleeding LED light unlike my OEM one, and the brick seemed lighter. So I weighed them, and the OWC one is about 25% lighter as well. Looking closer I see that the little ears that pop out to coil wire has a difference - the Apple one has bevel around it and the OWC doesn't. Isn't OWC an Authorized Apple Reseller? I expect Chinese knock-offs on eBay and Amazon Marketplace, but not macsales.com.
What do you guys think?