yeap... that's how much some LP's might cost.
I just got Radioheads In Rainbows Boxed set... 45rpm and CD set, usually it runs about 100-200$. sometimes you might get lucky and find it for less. you could get the normal release for $17 though.
Trying to get the Inception soundtrack... normally runs for between $250-600, Fire Come Walk with Me soundtrack... between $200-400, The Dark Knight soundtrack... between $125-175