exchange
For some reason it is very hard to change money other than Euros and US-Dollars in Lima. You can't even change the currency from neighbouring countries in normal money exchanges and banks. You might find more flexible exchange offices at airports, but they often charge ridiculous service fees and exchange-rates. Changing money in Miraflores can be done safely with cambistas on the street, but you must follow a few simple rules to avoid being cheated. First, make sure that the cambista is wearing the vest-uniform indicating that he or she is an authorized, licensed cambista. Always ask for the exchange rate "tipo de cambio". It is worth it to compare with several cambistas, especially if you are changing a significant amount of money. Some of them do tricks with their calculators in your face and you won't notice, so the best way to know how much you should be getting is to bring a calculator yourself or use the one in your cellphone. Finally, make sure that the bills the cambista gives you have his or her seal "sello" stamped on them - that way, if by chance one of them turns out to be counterfeit you can come back and complain. I have never gotten counterfeit notes from a cambista, but asking for the seal probably helps maintain the incentive for honesty.