No! These countries are always cheap to visit. You can visit these countries any time of the year, but you can make the most out of your money only during the best times to visit that I've mentioned. And during these times there are fewer tourists so you can enjoy the tourist attractions all by yourself. And during other times of the year, it'll be hard for you to find any accommodation at all as all places remain filled with tourists. To sum it up, these countries are the cheapest countries to visit compared to other countries all year round. The prices just change a bit during different seasons (but don't go beyond a backpacker's budget).