Got two types of charges. One is fees/duty that need to pay to the respective authorities. This type of fees won't change from lawyer to lawyer.

The second fee that will have discount is on the lawyers own services fee. Because competition is stiff between law firms, some willing to offer up to 30% discount (do take note this is illegal to give discount). Another thing to pay attention is the miscellaneous charges like phone calls, photocopy paper, transportation those can all be waived.

This is based on my experience recently I bought a property and now in progress of sorting out the legal side