Another vouch for Secnx. Sold 30b RS3 gp to them and I've sold similar amounts to them many times over the past couple of years. All the trades I've done with Secnx have gone well.
Another vouch from me to Secnx! I sold them 30B RS3 gp this time. I've traded a bunch of times with Secnx over the past couple of years and all the trades have been good.