back2eight: Becoming a member is explained in the catalog and on the order sheet, and gives you half off. Considering what their plants cost, the cost of membership, even if you give over the minimum, instantly pays itself off. Also, I consider it in my mind to be them giving me some plants for free for me supporting their research and conservation, because I could just as well buy from a for-profit place at the member discount price, but chose to buy from that particular place for the aforementioned reason.
Best/worst price:
Best: I got sale unlabeled nepenthes in 3" pots that didn't look so good for ~$3-4 each, of some regular easy varieties (vent, sang orange and red, maybe copelandii?, and something else that didn't make it) as well as some other more fancy hybrids and species on sale, that have mostly popped back to health except for one 4-5 months later and are my best looking pitcher-ers. The down side is that they looked cruddy because they were probably bug-infested so that I had to neem my whole collection down for a few months...but I consider it a learning experience because this was the first time I have successfully fought and won a bug-battle on my plants, and I learned that you just don't buy from some nurseries even if they're giving stuff away for one shiny red cent.
Also, the N.leuco I got from flytrapshop if HUGE for the price I paid, considering the other Sarrs I have ordered from elsewhere. It helps that leuco is my favorite Sarr
Worst: I got an ampullaria from that vendor that everyone knows sends dead-ish neps that are mite/aphid/thrips infested that died a slow, agonizing death for the month after I got it. On the up-side, I did get a pretty big Platychila from them that has been thriving with me from day one.