Pass about to expire? Did you get a renewal letter in the mail? Want to avoid paying the new ticket prices?
Just like last year, if it's almost time for you to renew for AP, then keep the letter that you get in the mail with the older prices. If you bring this letter to Guest Services for your renewal, they will give you the price listed on the letter (and not the increased price). Just got off the phone with Guest Relations at Disneyland to confirm this. They can do this for both one-time and payment plan prices.
Note that this older price is only valid if you need to renew - and is NOT valid for new passes, they must pay the current AP price.