Hi I think I found a bug. It seems that all glasses type items do not get added to the list unless it is already equipped by the unit accessing the shop. I've checked both the shops cargo using cursorObject getVariable "TER_VASS_cargo" and cursorObject call BIS_fnc_getVirtualItemCargo after accessing the shop at least once, and these do return the correct list of items, so the problem is somewhere downstream of fn_addShop.sqf. Uniforms and other items classed as "Equipment" don't seem to be affected. Could you take a look?

Also for line 60 in RscDisplayCheckout.sqf you should add "CfgGlasses". Won't display item names and pictures correctly otherwise in checkout dialog.