Slow cooked lamb shank is one of my favourite winter dishes. Using the slow cook method requires a slow cooker and if you are looking for one make sure they have the capacity to sear as well as cook slowly and even more important, the capacity for holding sufficient quantities (this dish serves 8 so it needs to hold 8 lamb shanks as well as sauces and vegetables).
There are a large number of slow cookers on the market and they range in size and cost from $50 to $150 so ensure you know what you are going to use it for. The slow cooking itself is fairly basic but it is added on elements which drive up the cost. We use a Cuisinart which cost $130 on offer and are very happy with it.