One can purchase Praktica cameras at the best price from reputable camera retailers both online and in physical stores. It is recommended to compare prices across multiple retailers to ensure that you are getting the best deal. Additionally, keeping an eye out for sales, promotions, and discounts can also help you save money on your purchase. Some popular online retailers for purchasing Praktica cameras include Amazon, B&H Photo Video, Adorama, and Best Buy. It is important to read reviews and check the seller's reputation before making a purchase to ensure that you are getting a genuine product at a competitive price.