Last year I grabbed a 12.9 smart keyboard folio of eBay. Cost me $100, but it was brand new in the box.This is kind of irrelevant, but I just picked up a 2nd hand Keyboard Folio for my M2 off eBay for £15(!), perfect working order but the rear is covered in residue from stickers (I sticker anyway so no worries). Anyway, what a fantastic bit of kit this keyboard is, lightweight, nice to type on and I have no need for a trackpad, perfect iPad accessory! Hope it gets renewed for the M4.
I wouldn’t hold my breath for Apple to make a new version of the Smart Keyboard Folio for the M4 pros. They’re going all-in on the “iPad as a laptop“ positioning and the high prices that go along with that.