Buying/selling prices should be firm?

In the market section, there are a lot of people buying & selling gold. Most people have adopted the approach of stating a range of prices e.g. "between $0.38-$0.43, depending on market conditions".
IMO, prices should be firm and updated regularly, daily if necessary

It's an awful time waster when you have to go from thread to thread, PMing people to find out prices.. it's very misleading.

I also think that people offering the highest price deserve to get the GP, right now it's anyone's game who gets it because the threads lack clarity & nobody is willing to go through all those threads, PM everybody and wait for a response. It's annoying =/

Firm prices would encourage competition between Buyers & Sellers alike. Thoughts?