I tried to reserve accommodation in Madrid for October. I sent sent off the email on Saturday and got a reply this morning (Tuesday) from the owner confirming that the room in the apartment was available and asking if I would like to confirm my reservation.
The advert for the accommodation had pictures and the price per night or per week was given up front.
I also used LoQuo last Easter to arrange English-Spanish language interchange and this worked well.
I hope this sets you mind at ease.