In message , at 09:08:48 on Sun, 14
Dec 2008, David of Broadway remarked:
I believe it's also illegal to sell/transfer the cards, so someone
else who happens to be visiting NY can use up the money.

It most certainly is permitted to give or lend a MetroCard to a friend
while you're not using it

But what about selling them? (On eBay or wherever).
--
Roland Perry