Predominantly just in a drawer with other stuff. Bought them in 2013 / 2014 from david at hardbtc. I'm hoping too that the private keys are not tarnished in anyway (but even if a few characters are illegible then it wouldn't take too much effort to crunch through the possibilities). Obviously I'm not going to try "peeking" at them unless they are unsold in which case I'll just get the funds out and use them as trinkets.
I am 99% certain your keys are fine. As long as they where stored dry at room temperature. I opened a cas coin for a client this year, the private key was in perfect condition.
You can expect the priv key to be in same condition as the short public key, which looks fine on your pictures.