This was listed in a guide book and it is true! We got cheap souvenirs in the Plaza Democracia. This is behind the Costa Rican National Museam which was small and very interesting and a block from the National Park. The souvenirs were the same as sold elsewhere and a lot cheaper. For example, my husband bought an Imperial beer t-shirt for 3000 CRC ~ $6.50 USD, this sold in the airport for $18 USD!!! Same shirt. Luckily this was a short walk from our hotel.