Many persons are witnessed to make several mistakes during car rental researches which are not expected but they do happen thanks to the ignorance of the doers. What might be the implications of the same? The agency might get cautious and refuse to make any deal with the concerned traveler. It is to be noted that one of these terrible mistakes is insistence to get cheaper rates. This is certainly not all; many persons are found to return to the same agency after wasting lots of time and months. In that case, the agency gets the upper hand and can charge anything, the renter has to comply with the same. All these take place owing to lack of researches. As a result, during a visit to Costa Rica or Las Vegas, largest city in Nevada and well-known for entertainment and gambling and general excess, the traveler has got make extensive researches on cheap car rental Costa Rica or car rental Las Vegas . During the research, the traveler must make comparative analysis among lots of companies and their rates instead of depending on only one or two.