I am trying to purchase Saints Row IV from various sources but it fails silently every single time.
I can select the item, I can press Proceed, its starts doing things but the Trade offer never comes in.
It goes to "Waiting for Steam", "Retrying", "Waiting for Steam", "Retrying"...

My TF2 inventory is like 1700 items big and takes a long time to load, which might be related to the problem. I can do test purchases if needed.

Trades I tried to buy from:
http://dispenser.tf/trade/95833/
http://dispenser.tf/trade/95600/

Would really appreciated it you could fix it, probably a bad timeout or something.

Did you enable desktop notification and see if the bot tells you that your backpack is full?

If the reason behind the trade offer doesnt come in is backpack full, desktop notification will tell you.