They have them at the bookstores to for 50, still, but it’s been a year since I purchased mine.
Used is cheapest. I’d post on free and for sale on FB or check FB marketplace. Amazon is cheapest for new, but bookstore works if you need it ASAP.
https://www.amazon.com/iClicker2-student-remote-iClicker/dp/1498603041
Thats why you dont sell it to the school. You sell it to fellow students. For reference, an iClicker 2 goes for $50 on Amazon USA (source: https://www.amazon.com/dp/1498603041/ref=cm_sw_r_cp_apa_i_gdkHCbWPTT6SB ). That's a new one direct from Amazon. You can VERY EASILY sell this shit for ~$25 on eBay, Amazon, OfferUP, or even old fashioned college paper advertisemenrs. eBay Proof: https://www.ebay.com/itm/iClicker-2-Student-Classroom-Response-Remote-w-Batteries-/303089687465
You college kids just need to remember the three Rs: Reduce, Reuse, RECYCLE.
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if u actually want one for $40