You have to watch them. Any thing with rubber is iffy. A guy bought a $400 NOS e vac advance and sent it to me for his distributor. a one year one engine one. No repops available. The vacuum side was dry rotted.
Yep I can imagine that happening. I was poking fun at what some people think is NOS and clearly its a used old rotted car part.
Some buyers aren't as educated...it's always Buyer Beware!!