Rather than say what I don't want (with 1 exception), here's what I'd prefer:
Amomum subulatum
Caulteya spp.
Ellettaria cardamomum and NOT Alpinia nutans.
Roscoea spp.
Zingiber spectabile
I'd also consider dividing the plant to get items 1-4.
I have seeds of Hedychium longicornutum to trade
I do have some small plants of Zingiber spectabile from tissue culture, they are growing well in quart pots.
Before these seed get too old; I'd be willing to trade for other ginger seeds &/or plants. Just about anything goes.
I have Hedychium Elizabeth, Hedychium coronarium, turmeric, Alpinia pink perfection, A. zerumbet variegata, Zingiber zerumbet (shampoo ginger) so those I don't need.