Stand not holding display, out of warranty, looking for pricing

My 2013 iMac - now long out of warranty - recently lost the ability to hold the display in place on the stand. When I try to adjust the display, it always immediately droops back down into the low position. The stand can no longer support the display.

I know I'll almost certainly have to bring the thing into a store and pay if I want this fixed, but I was wondering if anybody else had had this repair and knows how much it might cost. Honestly, if it's too much money, I'll live with it. Though I'd rather not.