https://marketplace.tf/items/tf2/5021;6 key price grid on marketplace for refferences, individual sales can be refferenced to the date here.

only 3 recent sales on this thing, all marketplace.

Sale 1, Most recent: 53.99$, sale on 3/6/20, keys were 1.71 each, equalling ~32.57, rounding to 32

Sale 2: 53.11$, sale on 1/21/20, key prices were 1.78 at that time, equaling ~29.8, rounding to 30.

Sale 3: 54.44$, sale on 1/19/20, keys were 1.77, equaling ~30.7, rounding to 31.

So we have: 30, 31, 32. leading us to a nice price of 30-32

Thanks to starplayer for histories!

https://backpack.tf/item/5241903072

https://backpack.tf/item/5195347883

https://backpack.tf/item/5188835394