There are two hydro shops within a few blocks of each other in my city. I usually go to one and had no issues but decided to check out the other one.. Walked up to the register with four 5G fabric pots, the lady said $32, I was like, uhh the shop down the street charges less than half that. She scoffed and told me to go there. I did, got my pots for about $15, called her back and told her nicely maybe she should recheck her prices. She hung up with a few choice words. But basically, be fair, be kind, and you will be successful.