I can get you Jackfruit seedlings, but not seeds.  Price would be 5 BTC per seedling.  Seedlings will grow into mature trees and will begin bearing fruit in 3-4 years.  You have to be patient with trees.  Shipping starts at 3 BTC for one and increases by 1 BTC for each additional seedling.  They can fit in a 1 gallon pot when delivered, but will probably outgrow that in the first year.  I don't know where you live, here is climate info: "The jackfruit is adapted only to humid tropical and near-tropical climates. It is sensitive to frost in its early life and cannot tolerate drought. If rainfall is deficient, the tree must be irrigated."