Yes... The only ones I like that are on FB are the ones with a legit FB business page. Those that do sales through their personal pages are not very professional IMO and make it more difficult for buyers. I've gone to some of those before and not been able to see photos, etc. unless I "friend" them. I don't like to friend people I don't actually know, so that usually kills the potential sale for me.
I like it when people have a standard website, but understand that can be expensive to host and difficult to update. When I start breeding, I will probably have to do sales privately at first, then expand to a FB business page, then eventually want my own website if I can can find a hosting service and design program that will be possible for me to do myself.