Ive spent quite a bit on my Amigas but the way I look at it is that i feel AMIGA will be part of me for the rest of my life. Its not like buying a playtstion 3 for £300 then after a few years i wont use it any more. I feel i will use amiga a very long time. And if the unfortunate time comes where I wont be using Amiga anymore, i can still sell it on. Amiga is like Gold now, doesnt lose value.
So my point is Turrican, dont worry justifying the cost if you can afford it. Its £325 for something you will enjoy. And if the time comes when your bored of amiga, you could always sell it on and fetch most of what you paid if its about the money.