$200 for a 4-piece starter pack
Bag stands are a ubiquitous tool in the wash/pack house. They can be used to bag up everything from roots coming off the barrel washer sorting table, to greens coming out of the salad spinner.
On our farm we bag greens like spinach, mesclun mix, arugula, and the occasional chef's 'toy box' into 5# cases using the 12 x 8 x 30" 2 Mil Gusseted Poly Bags from Uline (S-1256), and we'll bag up heavier items into the 16 x 30" 3 Mil Industrial Poly Bags (S-10991).
For longer term winter crop storage (carrots, beets, watermelon radishes, and so on), it is absolutely necessary to store these crops in perforated bags. Look for a distributor in your area. If you find that you can't justify their minimum order, it's not such a bad job to sit down in the winter, put on a movie, and make 100 ~ 200 of your own perforated bags with a single hole puncher. We've found it guarantees a good perforation, and also allows you to punch a hole down in each corner of the bag for proper drainage. Once you get going the job will fly...