As a relative newcomer to Oldhammer (is that a contradiction in terms?) I've been spending some time looking around the at the various sites that are out there and generally engaging in insane levels of virtual shopping.
The Stuff of Legends website is the go to place for information on what's out there. Here's the Marauder Miniatures page that's occupying much of my google-time. If things go to plan I'm aiming to get my hands on pretty much everything that appears in these catalogue pages but as I'm hoping to get some third-edition gaming in I'm going to try to start by aiming to get a playable list sorted. That means starting with a smattering of heroes, 20 Boyz, 20 Arrer Boyz, 20 Gobbos, 20 Stickas, and a Skull Crusher. I'm at the mercy of ebay I suppose!