I don't really mind IGB, i just always found TBT to be easier to use on the forums. The conversion ratios get kinda weird since you can sell 100TBT for 20M, but auctions for T1 seem to be low based on that conversion. It's a very confusing system if you ask me.
But sure, i can take IGB. Maybe around 20M? Weird system again, sry if it's weird pricing here >_<