Shadow of the Colossus: bloody expensive

I was looking for shadow of the colossus on PS2 recently because there's a LBP shadow of the colossus DLC soon and i wanted to re-play such an amazing game. After not finding a copy in my local game shop i went on the internet and found most websites were charging £30 ($45) for the game dispite the fact it came out in 2005. I know it was a brilliant game but was it really rare or something? I can't understand why its still so much money.

Anyone got any thoughts?

Probably so outdated that they forgot to set the prices down

Lol I sill have my limited edition copy with awesome art cards. I was playing it just the other day in fact. Anyway, my point is you can borrow it if you want

At first that's what i thought people are still bidding up to £30 for it on ebay aswell.

It was a extrimlly rare Game so it will be expensive because it is a collectors item.