im going to amsterdam in May I need to find a hotel for 3 days and cheap. like 50 euro. thanks

Look at these sites:
http://www.eurocheapo.com
http://www.bookings.nl
http://www.sanluchesio.nl/
http://www.studios92.com

However, I think you might have unrealistic expectations, particularly if you want anything decent, and particularly if it's a weekend date. A few good places do exist for that price, but many will already be booked up.

Yikes - you might only be able to get a bed in a hostel for that price.

I'm a budget traveller and am pretty good at finding good budget hotels, but in Amsterdam ... well, the best I've done is in the 79-80 euro range. But I'm also not willing to go "too budget"!

Good luck!

I'm not sure the situation is that dismal, except for the tulip season issue. My daughter and I had a 65-Euro rate including breakfast at a Best Western in Amsterdam last August (we were booked at the Lancaster, which would have been fine, but we were bumped to the much more convenient Eden on the Amstel). I got this deal through Bookings.nl (mentioned above). Our hotel was a perfectly adequate full-service 3* hotel with a good breakfast.

http://hotels.medialink.nl/amsterdam/amsterdam-hotels-by-price.htm

Is a good place to look and Queens day is April 29th so it will chaos in the streets that day!

have fun!

here is one that is a bed and breakfast kind of hostel

http://www.hotelutopia.nl/

25 a night!

Hotel Brouwer
www.hotelbrouwer.nl
55 euro/night single, and consider yourself lucky if they have availability. I concur with the others if you are hoping for double occupancy at that rate!