I bought one of these last year for pumping out my garden pond. It works well and is a very good price for a 13,000 l/hr pump.
# Heavy-duty water pump with powerful 650 watt motor
# Maximum pumping capacity (l/hr): 13,000
# Quiet, maintenance free motor, with overheat protection
# Max. immersion depth (m): 7
# Includes 8m rope, 10m cable and instructions
# 3 year manufacturer's warranty