something. If you have insight into your real estate broker's bottom line, he's more apt to give you the better price. If you are facile with the insider words caterers and car salesmen use to pad their profits, if you're savvy to techniques moving companies and mechanics use to bilk the unsuspecting, if you are on the lookout for lawyers' methods of fattening fees—in short, if you know the ropes, you will not get ripped off.