Reporting's Seed Exchange Forum is great
I do lots of trades on Gardenweb forum- Seed Exchange. If you want to trade for flower seeds I have lots. For vegetables I have Arugula, Green Oakleaf lettuce, Radish mix, Thai Basil, Italian Basil, Chives, Lemon Balm and Red Cherry Tomato, too. What are you offering in trade? What are you looking for?