Mosquito dunks - Selling individually

Selling individually at $5 each or $8 for 2 so you can test them. I bought these for a fungus gnat infestation and it was completely eliminated in about 2 weeks. I can do lower prices if you are making another purchase at the same time or have a trade offer I am interested in. I do have one used dunk that I can sell for less too (at least a good 75% of the ring exists – can send pics). I also have an expired very lightly used bottle of 100% neem oil available if interested (expired Mar 2025) and yellow flowered shaped sticky traps as well. Open to offers. Open to trading for plant cuttings/offsprings I am interested in (assuming no infestation issues). Primarily looking for string of pearls/hearts/dolphins/watermelons, pink princess philodendron, fishbone cactus, pink quill plants. Major Mac/Woodbine in Markham.