You can't compare Amiga prices to PC prices.
Its the law of supply and demand. There isn't
enough demand for Amiga hardware so the price
is higher. If you really want it, you pay the
price.
Just remember.. some pieces of hardware are much
cheaper now than when new.
It all comes down to 'How bad do you want it'
When I want some piece of hardware I shop around
and usually take the best price I find.