Sellers for 1.77 = https://imgur.com/a/ktZGs , https://imgur.com/a/sUV6U

Sellers for 1.88 = https://imgur.com/a/mOYCg , https://imgur.com/a/LYGOV

Sellers for 2 = https://imgur.com/a/ZBJtV , https://imgur.com/a/cf9tY , https://imgur.com/a/7Lwuw

Item histories:

http://backpack.tf/item/5220862045

http://backpack.tf/item/4981295574

http://backpack.tf/item/4909318355 (Several for sale for both 1.77 and 1.88 refs)

http://backpack.tf/item/4657246788

http://backpack.tf/item/5136882852

http://backpack.tf/item/4105550434 (Several for sale for 1.77 refs)

http://backpack.tf/item/4971359799 (sold)

http://backpack.tf/item/4711048741 (Newly bought)

http://backpack.tf/item/4968147789

http://backpack.tf/item/5184692921

http://backpack.tf/item/5190444429

http://backpack.tf/item/5120895929

http://backpack.tf/item/5143800094

http://backpack.tf/item/5176738690 (Newly bought, but unsure if exist)

http://backpack.tf/item/2803527871

http://backpack.tf/item/5192295096

http://backpack.tf/item/4983987705

http://backpack.tf/item/4907899681 (Newly bought)

http://backpack.tf/item/5194607711

http://backpack.tf/item/2746208901

http://backpack.tf/item/4891482583

http://backpack.tf/item/5101776958

http://backpack.tf/item/4063282635

http://backpack.tf/item/5089556993

http://backpack.tf/item/5192182889 (Newly bought)

http://backpack.tf/item/5185424268 (8 days since buy)

http://backpack.tf/item/4906962894

http://backpack.tf/item/5094463258

http://backpack.tf/item/5221876711

http://backpack.tf/item/5151954684

http://backpack.tf/item/4607391662 (Newly bought)

I can find more, but i think this is enough. 1.77-2 range fits with the buyers.