I have been working on this premise of, half retail here in australia, with most spinnerbaits selling here for around the 12.00 mark, mine are selling well. My spinnerbaits are made for murray cod here in austrlaia, and I rarely see mine last more than 5 or 6, but this is due to the size of this fish.
I have the same problem on my lighter spinnerbaits, but due to them catching fish and lower cost per spinnerbait that they sell anyway, and people are willing to repurchase if they are catching fish (after all most fishermen buy their fishing bait regularly) why not new fishing lures.
If you explain to your customers that the fishing lure should be replaced every so many fish, so as to have a lure that is performing, most people won't mind (especially if it catches fish).
by the way id love to get one of those off ya if ya have one spare, I'll send ya one of mine.