One of the tenth of low star hotels and guest houses in Saadi street. Maybe you dont choose it for luxury tours but its location is very close to Tehran city center and Bazar and you may go to Bazar by walking and skip traffic jams to reach 5 star hotels at north . just you should be aware that such these hotels doesnt have any reservation system and its not possible to do reserve the hotels in this street, but there is over 20 hotels at the same street and always there is chance to find a room to sleep. 

however there is not any reservation system for them but you may call them.