They grey market is tits up atm given that CIG is hawking ships every ten minutes these days. It's nothing like it was during the 'glory' days when CIG appeared to be sticking by the position of not offering various kickstarter reward pledges up for sale again.
Best hope is that you'll get a 1:1 unless you happen to have something extremely rare. But even rides like the Glaive aren't going for that much above the board.
