What he is doing is NOT illegal because the software that he burns to the Mini-CDs are all freeware or abandonware.
Sorry, but you are incorrect. They most certainly
are illegal.
"Abandonware" is a funny term. For some reason, some idiot got it in his head that if a company chooses to no longer distribute or support one of their products, it has been abandoned and anyone can copy it. What a bunch of crap! A company doesn't lose the rights to software just because it isn't sold or supported. This means that unless you get specific permission from the owner of said rights, you are indeed in violation of copyright law for distributing or illegitimately owning that software.
I should also like to point out that just because a piece of software is freeware or pd does NOT mean that said software doesn't/can't have restrictions to its use or distribution.
So.. What DoomMaster is doing
is illegal.. I'm not an anti-piracy advocate, but anyone dumb enough to try to profit from it publicly (such as on ebay) deserves what misery may befall him.