He doesn't *have* to sell pants or anything, he does it out of his kindness to his fans to allow them to have memorabilia of himself.
What a great legacy his leaving behind.. pants probably with shit stains. If you want to call that memorabilia, go ahead.
It's not like he's charging an arm and a leg for it either.
No one would pay more. I doubt many people buy them even at their current prices. Most people are sane enough to pay for crap like that.
What other pro bodybuilder is thoughtful enough to do that.
Thoughful? Well, let's see... for example. Lee Haney started a camp for children without fathers to help them out. Is selling underpants the greatest legacy Nasser is able to do to humanity? You're truly impressed easily.