Bests & Worsts Reviews from Amazon

Here is my beef..... A couple years ago husband researched the best shaver possible and invested in a Braun Series 7. Last year the replacement head cost $31. This year it costs $89. What gives??? He'd be better off just buying a new one -- the original shaver wasn't much more than twice the cost of a replacement head! He loves this thing but our budget just can't handle such exorbitant prices for replacement heads.