I sell stuff online. I sell a lot of movies.
I also get people that will order from me and then email me that the movie sucked and they want me to give them their money back.
Um, I didn't make, write, direct, act in, or even light the movie. I have no control over how good or bad it is. And some people like it and some don't, so I can't guess what your tastes would be and refuse to sell it to you if I think you won't like it.
Go online and read reviews before you buy it to see if you think you will like it.