@Forthewin1123 I buy from sales all the time, why wouldn’t you? After a minute you have a feel for which labs you prefer, then you pick between them. There’s still a degree of loyalty in that too, I buy from a couple I trust, and go with whichever one can give me a deal at that moment.
It’s also a good way to try different brands, or for new brands to get their name out. That can work either direction though, a lot of unknowns are only around briefly, and for good reason unfortunately.