My hotel in Bangkok, Rajthevee near Pratunam and Silom, has excellent rooms incl. breakfast for ฿981 (€ 23/$ 32), which makes it belong to one of the cheaper hotels in Bangkok.
I booked it quite in a hurry and even forgot it has a rooftop swimming-pool, which is a bonus to me now and I am really happy about the whole accomodation. One comment below on Agoda I tought was funny enough to publish:
Note: I wonder if the pool was occupied by Germans and Swiss would it be any better?