Just announced!  

Save 10% on select Tele Vue eyepieces especially chosen for the best views of the planets, including the Perehelic
opposition of Mars this July! 

direct link: https://khanscope.com/collections/tele-vue-mars-madness-eyepiece-sale

Choose from a variety of Plossl, DeLite, Delos, Nagler, or Ethos eyepieces, or pick up the popular 3mm-6mm Nagler Zoom.

  Hurry, sale ends July 31st!

All the deals are right here:
https://khanscope.com/collections/tele-vue-mars-madness-eyepiece-sale