Mostly because they all have some variety, or supplies that only they feature. I noticed Johnny's seemed to jack prices again, so try to limit on them and more to Southern and Territorial. I also save a few varieties of seeds, but it's never enough. This season I'm going to try Kabocha green squash on demand from the head chef.(wife) She heard one of the chef's on the food network say how great the taste is, so there! I'll skip beets this year, and grow more chard and kale, and some other greens. I also have to grow my hot peppers(somewhat medium heat), Hungarian hot wax and Krimzon Lee, which I blend with about 20% of Sweet Banana. The local high school sells plants from their hot house in the Spring, so I usually buy some plants there to help out. So I bought those Sweet Banana peppers a couple years ago, and now they're on the 'regular' list. I'll be cutting back on my watermelons, to one variety, Sangria. Then I have seeds for tomatoes, but I'm adding Cherokee purple, and going back to San Marzano for tomato sauce. I tried these Maxibel filet stringbean last season, and found them to be good producers, and tasty, so will order them again. I also tried doing buckwheat as a soil improver a couple years ago, and liked the results, so this year I'm trying alfalfa, which also leaves a nitrogen fix in the soil. I know the buckwheat can be self-sustaining, in that you can wait for the seeds, before turning, so hopefully, I can do the same with alfalfa. Otherwise, it's an expensive proposition.