Natalie, the BAP-10 (liquid) that we last bought probably three years ago was $160 for a liter. Smaller quantities can be found for lesser amounts. If your flower beds have worms, then your dirt's not bad. They will like a snack in the spring!
Also, I just read a post on Facebook that John Peat made about BAP-10 (liquid). He said the best time to spray it is the spring before the daylily starts to scape which is the opposite that we were told. Could it be that as more people are now using BAP, different people are trying it at different times and in different ways? He also said this about BAP Paste: "BAP Paste can be applied to the crown where you have damaged it during digging and dividing. The paste will help to protect the wound from pathogens and at the same time help with increase."
