Sadly some people have more money than others, it's how things work sadly.
Personally I think spending anything morethan £40 is a bit nuts, let alone the £60 odd quid one of the tp2s is going for, or the £100 DC04 is at, but hey, someone will bebloody excited somewhere (hopefully, good point about average joe buying the tp2, unpacking it then smashing it into the sofa a few times...)
I should imagine the sellers are exstatic about this, they are supplying a demand, nothing more. I wish the tat I had in the garage would attract such attention!