Wanted, Heirloom Seeds

I am particularily interested in heirloom vegetable seed. I am also interested in winter squash and tomato seeds (not necessarily heirloom.) Would like to find hardy, easy to grow flower seeds that bloom most of the summer.
I only have a few things right now to swap, hopefully more in the future. I have marigold seed, dill seed, coneflower seed, iris, lily of the valley and lilacs. (the latter when they start to come up in warmer weather)