I have an unopened/sealed 5g can of MR12 that's ~2 years old.

VP seems pretty loose on their shelf life specs - saying that it's "best" if used within a year on the website. I can't find anything that says it goes bad by a certain date...

It's probably fine - but do your research and decide for yourself.

So - throw me an offer. It's going to the hazmat recycling center if no one wants it.

g