(Sidenote: If by any chance you have plans to travel, then don't buy that ticket until you have read my review on a book that contains an insider's guide to help you get up to 75% discount on airfares. Refer to the bottom of the article for more info.)
Do you want to explore Peru and see the Machu Picchu perhaps? Peru has a lot of sights for the hungry-eyed traveler whose fondness extends from history to archaeological adventures. In Peru you get them all!
If Peru seems to be a distant dream because money is a problem, when will you ever start to realize that dream? There are several agencies offering cheap airline tickets to Peru that could help you realize that long time dream of seeing the old ruins of the Machu Picchu and the exotic sights of Lima.
Some travel agencies based in the United States may not be able to offer you cheap airline tickets to Peru because they are only middlemen acting in behalf of the airline companies and have no control whatsoever on the ticket prices. As middlemen, they aim to profit out of your ticket purchase and definitely you cannot be sure that what you are getting from them are indeed cheap airline tickets to Peru.
Secondly, middle agencies add huge margins over the ticket prices to the actual cheap airline tickets to Peru, making them expensive in return knowing that the consumer cannot do anything about it when the demand is high.
But hey, since you went to them, they can do anything they want. Remember that the principle of business is making money and cheap airline tickets to Peru, don't really offer these agencies much money. So when the demand is high, they would rather go in for the kill and offer expensive tickets to buyers who would be willing to pay extra.