How do you equate a "sweet deal"? If you are looking to train dogs for the long run, then I would recommend Neuman and Bennet's bumpers. They are not cheap, but if you buy then in dozen quantities they give you a little price break. Out of about three dozen I bought from them over ten years ago, I still have 35, lost one somewhere. They are still pliable and not damaged by UV. In the long run I think they have been a sweet deal, since I have not had to replace any.
Oh, by the way, I had 6 that were faulty, cracked along a seam. They replaced them with 8 and refunded my shipping expenses for returning the faulty ones as I remember.
Great folks to do business with.