Anode prices have gone up recently (I don't know if thats a lot for the ones you have though) becasue of shortage of zinc. I know someone who had 4 anodes replaced on his 41 foot Gin palace recently; set him back about £250
This is true and I spoke to someone in the last couple of days who has said the the price rises which originally hit the suppliers are just starting to hit the shops. This may mean there are a few bargains left.