It's called SteamScout - Steam Market Monitor, the website is [Only registered and activated users can see links. Click Here To Register...]
I found it to be very useful for watching the market when I'm away from desktop, I recommend it to anyone who buys from the Steam Market. Check it out!
I found it to be very useful for watching the market when I'm away from desktop, I recommend it to anyone who buys from the Steam Market. Check it out!