I think You I think you can't throw any items from tibia store to the dustbin.
I think so because i I wanted to throw out not needed for me dishes from my npc, wich which are stored also in the store and I couldn't do it.
All i I could was to put them into not usefull useful one of many lockers in depot :)
Once i be I am online after 23:00 c'est i CEST I will try to put one of my carpets in house into the dustbin and i I will call You :)you :)