I have been so disappointed in the quality of bait lately. Better not name brands, but a commonly sold brand of bait prawns has really been poor lately.
I have had seaweed, crabs, funny things with nippers, and tiny tiny prawns that are useless as bait, all mixed in making up the weight. About half the 200g packet is usable as bait, and they are charging nearly $8 in places for it (that's $40 a kg). Also, it is often very old, must be sitting going bad before they freeze it.
Small wonder people are tempted to buy green prawns from the seafood shop.
Sorry, just had to rant. One good thing, it has made me discover chicken thigh fillets as bait