No way. Really?? Surely it's the rarer patterns. I'm positive you can still buy those dishes new. My mum's ones would be from the late 80s at the very earliest.

e: now I'm reading this article https://www.homestolove.com.au/your-corningware-could-be-worth-thousands-of-dollars-22737 and holy heck my mum definitely has the second one with L'echalote La Marjolaine - so many memories of potato curry in that. I don't think she has the original lid though.