I am a buyer. Yesterday, I ordered 8 items through the marketplace ... each one paid for separately (not through the cart), and only recieved one of them. They are marked as delivered, but never was.
Today I ordered two freebies, and only recieved one.
Unfortunately, buying at the marketplace is more riskier than playing a slot machine lately. Guess I will also have to stop using the marketplace .... and possibly leave my premium membership at SL, if things do not improve very quickly.