Onebyone

I always search the name of the place selling. If legit then legit phone number and customer service available, legit website, and no bad reviews when searched the name of the business. If something is less then 40% of regular price then it is probably a scam unless from a site you know is legit.

Peckish

EXACTLY. I look them up to see if they have a website with a United States address, and that the address is valid, and that I can actually see the physical store front on Google maps. One time the business I was looking up had a website and a US address. I had a funny feeling about it so I googled the address. There was no such town in that state, and no such street found in that town. Nope, not doing business with THAT entity!