What's the rate you're asking for?
Let's say like fg:1k crowns for example.
Last time I did a crown trade was in-game for like 1mil vs 1k crowns. <---- I'm sure I've gotten cheaper rates like 650k but it's been a while since I've played.
Using that logic I'd say like 250fg:1k crowns.
I'm selling in game gold for forum gold.
I have 2 mil available, each million i am selling for 250fg.