How old is too old to buy an IPA?

surely.  i had a pal send me a six month old pliny the elder because he wasn’t going to drink it and it was before you could get an ipa in the state of mississippi.  it was good, but it wasn’t PtE.

That story has been thoroughly debunked, but you’re right to say that the early IPAs would have been aged for long periods of time relative to what we consider normal now.

In this case, though, the consumer will undoubtedly have a fresher example in mind when they purchase the beer. JM, unless you’re able to open one and taste it next to a fresher can (and it passes the test), I would return it.