Is that allowed on this website? I have two friends that play casual exclusively, and have a few money cards that they want to trade off, since they aren't worth the price to them.

As long as you have the cards in hand when you finalize a trade I see no problem with it. I have helped a few friends out on this site before.

We wouldn't know if you were trading for yourself or someone else. I say as long as you have the cards, go for it.

It's your reputation, do what you want with it.