I was lucky
I just bought my first crested gecko yesterday. I was smart and did a lot of research before I looked around at prices. I specifically chose a crested because of their lower temperature requirements.
I went to both a small pet store and a petsmart first. At both places, I was told I would need a regular heat lamp, like the ones I use for my bearded dragons. When I asked about the lower temperatures, one guy even told me I could do whatever and if I killed my gecko, it wasn't their fault. I was really disappointed. I started to think that maybe I misread all the information.
My last stop was at petco, just to check prices. They had 5 or 6 small ones for $50 each. A woman came to help me and brought each of them to the front so I could pick one. She told me which substrate I should get because it holds moisture well. Then she made sure to inform me about what temperature and humidity to keep my tank, and even pointed out which bulbs to use if the room temperature is too low. Everything was clean, and she seemed to really care about the animals.
It makes me really sad to hear that people use animals just to make themselves money without caring about the fact that they are living creatures. I'm glad I was lucky enough (well, my little gecko was lucky enough) to have a good experience. I just hope he's as healthy and happy as he seems.