I've been using Slickdeals for over a decade. They are user-submitted deals, verified by others. There are some really good ones that come and go quickly when vendors realize something is mis-priced or when there is a limited quantity. But, yeah it's legit! Just make sure you're not going to some shady store - if it's one you haven't heard of before, read up on it. I refuse to buy from Rakuten for example because of them abusing customer data in the past. They have some deals occasionally. So just do your research on the store, otherwise enjoy the deals!