We have purchased all of our water valves from Reptile Basics, http://www.reptilebasics.com/rodent-watering/. We have upgraded our rodent racks and now have around 50 water valves, both Vari-Flow Drinking Valve and Original Drinking Valve-Large, that we are looking to sell. The valves were used for 1 year. The have been cleaned and are ready to be shipped to you. We are asking $2.00 each. Thank you.