Okay, so I have previously posted that i have a tamron 200-500 for sale, but now i am thinking about selling it to adorama. My question may sound paranoid, but how trustworthy are they? If i ship my lens to them for a quote (insured shipping of course ) how can I be sure they'll ship it back if i don't like what they're offering? And how can I be sure that I'll recieve the money if i accept their offer? I know they're large and probably would have gained a bad rap if they ripped people off, but still- are they as good as B+H?