SubPrime
As Amazon is my online store of choice, I checked there first, and found one for the same price. As an Amazon prime member, I’m always looking for the ‘Prime’ availability image which lets me know the item I’m about to buy is available for free 2-day or $3.99 overnight shipping. When I don’t see this image, I know that the item might be sold by a third-party using Amazon’s services (although some Fake Amazon items are eligible for Prime, too).
I do the same thing. I signed up for Prime almost as soon as it became available, because we buy enough stuff from Amazon that I immediately knew that it’d save us money in the long run. I’d sort of like my Amazon search to automatically sort by Prime availability first and then whatever it it defaults to now (relevance, I think.) Nothing more disappointing than looking for something and finding that it’s Fake Amazon.
Update: Here’s an example.
Wouldn’t that be nice! Or a “sold by” filter… The trick I hear is google search site:amazon.com “Ships from and sold by Amazon.com” along with what you’re looking for. A bit clunky, though!