There was a Shutter Shades on market with a price of 19k, I clicked the "Buy Item" button, then checked PM's and it said that I bought it for 30k?! the PM is true, because I lost the 30k :| .

propably you saw 19k on other item and didnt notice be more careful next time thats all

I'm sure It was 19k on shades >.<

Maybe he changed the price to to 30k.

Or... you saw 19k on another item. :T

hmm, this should be fixed, like if you are buying an item that its price has been changed just after market page load (the price you're seeing on the market page), it should give you a notification or something.
because I'm sure 19k was on Shades not another item.