[purduephotog]

Purchase them from Leslie's pool supply - 1.99 each, free shipping.

I learned my lesson this year- many stores had them in stock, but 2 weeks ago a local robotics team went around and bought all the stores out. The one store knew it was for robotics and had heard the team saying they had already cleaned out the other stores....

We borrowed 8 from another team and will return 8 when we get our shipment in. Lesson learned: Buy in the summer.....