i cant buy weapons w/ metal nor with weapons

[Submissive Medic gf <3]

every time i tryna buy the classic or the original i keep getting the "No items are being transferred. This likely means you can't afford what you attempted to purchase" error while using scraps (even tho i have 1 untradable scrap and 3 tradable scraps). when i tryna trade with weapons instead i only see the quick fix, i have a lot of weapon drops that dont appear as tradable except for quick fix.