In the Mafia Wars Marketplace, you can now visit Trader Goh's Pawn Shop. Here you will find high-stat items that you can acquire by trading in other items in your Inventory.
There is some very good loot here, with attack or defense stats reaching the low 80s:
If you select an item to trade, you are shown how many of your own items, at each level (Common, Rare, etc. - as defined in the Inventory page) you need to trade in.
But this is not a pure loot-for-loot pawn shop. Even the lowest-end items require you to spend 1 Reward Point as part of the swap.
To get items that have better stats than items that drop from jobs or fights (like the Phantasm or Nyala), you need to spend between 2 and 7 Reward Points - each.
With rumors that new Italy Regions will be out shortly, you may want to save your Reward Points for energy and stamina refills to plow through the new jobs, which will likely drop high-end loot as well.