Joe, suggest you search on
ebay for kiloware lots similar to what you want to sell, then select the "completed listings" in the search options. That will give you an idea of the price point that actually sells.
Would be tough to find Falkland/Georgia kiloware I imagine. There is a gorgeous 6oz lot of high values postally used from Pacific Islands on
ebay right now, 12 bids at $88 so far.