Yes but if you set up a website to do this they could sue, which I think is reasonable as many if not most people would be happy to both sell and keep a copy
I don't think people are so against DRM, because a disc like that was essentially a form of DRM. They are against an online DRM scheme which could change in the future. I know there were sone disc DRM that could like revoke the disc license, but let's go back before that was a thing to like the Xbox/360 and PS1/2/3 era style.