Even though it is from the Amazon site, it is not clear what third party is shipping the order, so I would reject both. The $500 is a T3i body (which is about what a reputable vendor would charge) plus a bunch of accessories with no brand name. An unbranded SDHC card or spare battery should be assumed to be crap. T3i's are available with kit lens or as body only, because some purchasers of a T3i already have a lens or prefer a lens other than the kit. If you don't have a lens, don't buy body only. You need a lens to take a picture. A T3i with 18-55mm IS kit lens package is $600. An 18-55mm IS lens bought separately is $250. The second package, T3i with 18-55mm IS and no other bundled crap for $600 looks good. However, I would not trust that link because it does not show me whom it ships from. Going to the amazon.com homepage and doing a clean search gives me this link That tells me "Ships from and sold by Amazon.com.", which is what I like to see if I'm buying a camera from Amazon. A third party might be okay, but I would want to see who that third party is.
Amazon... that's where I bought my t3i.