That is ridiculous, and I actually own most of that lot!
That pump can be had for £50, though when I packed DP off to get one in an emergency it was more like £80; sterilisers are on Freecycle daily (and I used a saucepan for a while), and bottles, storage cups etc aren't that expensive.
I certainly spent over £200 though getting to bf ds, with shedloads of breast pads, cushions, shells to collect milk, and travel to bf help sources. I'm very glad that I can now use the Breast Friend cushion and the pump again with dd - so this time it's only the cost of another few 100 breast pads and a couple new bottles.