How much longer is my snake likely to live?

I've had my corncake since 2006. He was very tiny when i first got him. I'm considering if i should buy another full load of jumbo mice shipped to my house.. i find the most economic way to feed my snake is to buy frozen mice online.. i buy in bulk to save costs.. I'm nervous that my snake may be nearing the end of his natural life span.. i still feed him once every 10 to 15 days.. i believe he has stopped being reproductively active since it has been about 2 years since he last went on a 3 or 5 month hunger strike... Anyone have knowledge about this? I know I've read in books before they live up to 15 years so i suppose i would just buy another full load.. what could i do with the Frozen jumbo mice if he did die before i use many of them?
Thanks...

There's no way to predict the life span of an individual snake, but corns have lived for over 20 years. Last week I read that a guy's corn finally died after 29 years. I've heard of some over 20 but that was an old one. I wouldn't worry about the next bulk order, but you can always give them away on Craig's List.

As a reference.. i last bought 50 mice in November of 2016... So while i generally shoot to feed in the interval of 10-15 days.. i guess the reality is that my average rate of feeding is one mouse every 14.6 days...

Twolunger, thanks for your reply! that answers my question perfectly

I hope he continues to thrive for many more years!

I would purchase no more than a year's worth of mice at a time anyways as they do really start losing nutrients after that point.