Recording and tracking the weights of your herps can help you get them into excellent health for breeding, and help you identify a problem if a non-eater is losing weight. I think it is very important.
I really like the "My Weigh" digital scale, I have the 6001-T and I paid $65 for it. I bought from Dr. Doug Dix of Deer Fern Farms and had a good experience. The link is below!