Real Estate / Websites to find an apartment for rent in Poland? [30]

There are many places where you can have a proper flat in a very cheaper rate but the other things which would effect that are the location of the flat, services and facilities provided with the flat , I would suggest you to have a place where you can leave as a paying guest which would way cheaper than renting a flat also the services provided with that are also more in terms of a rented flat plus if you are traveling alone then it would be a way easy on your pocket.