don't always trust the "trusted seller" labels. go back a few months (or several) and contact some of the people that bought from those sellers. often times, people leave good feedback for prompt shipping or service, only to find out the product they bought was a knockoff after it's too late to get their money back. and with feedback already left, they have no recourse of any kind other than to send the seller nasty messages. contact people who bought from them some months ago (you can do that) and ask them about their experience. more specifically, contact people that bought items similar to what you're interested in buying.