Can't buy on steam...

ok, close steam. clear cookies from all your browsers, get into steam and try again.

have you been gifting games to people not in your region by any chance?

I'll use this as a chance to springboard my thingy. Who wants a trine 2 coupon?

Has been like that for 10+ hours for me, its the reason I missed out on Vampire Bloodlines...

You are not alone.

it has begun!!

If you're using steam client, restart it :)

A always had that problem trying to use my Entropay card. You could try paying with your card through PayPal. It's free and only takes a moment to set up. If Valve wants to pay extra fees just to make me jump through a few hoops, that's their own problem.

Edit: Plus, Steam Support seems to be responding faster during the Sale. I got a response within 18 hours.