Its not about price controls so much as wanting to keep the forum from being overpriced crap deals...
Isn't any item worth exactly the amount someone is willing to pay for it? A phrase like "crap deals" is ambiguous. What's an example of a crap deal? I know on every item I've posted I've received "yard sale" offers, which would certainly have been exceedingly excellent deals for a buyer but would have been crap deals at a high loss for me.
Perhaps there could be a section for "priced for immediate sale" for highly motivated sellers. It seems that could be what many if not most are looking for rather than fair deals for both parties.