I’m unsure if the site/ad I saw is a scam! I might buy from them!
First: take a look on our page on How to spot a scam. Then try searching for the site in a search engine, if the site has been around for a while it’s likely that people have talked about it somewhere.
If you still want to chance it (which we don’t recommend, since we think it’s better to spend that money in a store that’s trustworthy and not “shady”, or donate it to a good cause!), treat it like gambling (with pretty bad odds): Only spend money that you are willing (and able) to part with, and do it with the knowledge that you probably won’t get what you hope for!