Hyperlink provided by GetItemInfo(id)[1] is a link for the normal version of an item. Whenever Scrap encounters items of a different version (e.g. mythic) it still tests the normal version for transmog appearance collection causing the addon not selling items properly. The following changes provide desired behavior.

        local _, link, quality, level,_,_,_,_, slot, _, value, class, subclass, bound = C.Item.GetItemInfo(id)
        local level = location and C.Item.GetCurrentItemLevel(location) or level or 0
+       local bagId, bagSlotId = ...
+       link = C_Container.GetContainerItemLink(bagId, bagSlotId) or link

I'm not creating a proper PR since I'm not confident enough on where to better apply the fix.

1. Scrap/addons/main/main.lua

   Line 147 in f13f889

   local _, link, quality, level,_,_,_,_, slot, _, value, class, subclass, bound = C.Item.GetItemInfo(id)

As ... may not include any bag or slot, You should make use of the location variable and use location:GetBagAndSlot().

Or better use, use a different method that accepts the location variable. Add this line right after the GetItemInfo line:

local link = location and C.Item.GetItemLink(location) or link

This has been working fine for me. I could make a pull request, but my past PRs have either been denied, or i did something wrong, and feel like an idiot.