Oh boy, what can I say here that probably hasn't already been said?

There are some Steam marketplace issues, like for example, too many times will I invest in a buy order and only receive half, or perhaps less, occasionally I'll get the full amount.

And don't cancel the order, because if you do, your money is gone forever and you get nothing. Needless to say, that's not good business.

That's like going out to war and taking The Bastard with you as your choice of gun. Big mistake.