Living in Southern California I am a regular customer of LLL Reptile's stores and have nothing but good things to say. The stores are always clean and the animals are well taken care of. The staff really cares about not only the animals but the customers as well.
Hardly seems fair to base judgement on what happened "years ago". If you haven't checked them out recently maybe you should.
There are very few sellers out there that would guarantee health past 5 days. It's just the way it is. Having a snake die suddenly after 10 days, while tragic for the OP, is not unheard of, and hardly should be held representative of a business. An offer of a discount on another animal is more than most will offer. At least the OP is not on here totally bashing LLL Reptile, and I do understand his feelings about the loss of his snake.
I for one, will continue doing business with them. I even have an order ready to be picked up, so will be going there Saturday morning.