I've been here for a few months but never actually dabbled in the trading aspect, though I got some things from the free shop that I wanna sell off for CSC. What's the conversion rate? I've seen 7mil as well as 7.3mil around, but I wanna double check. Thanks!

Typically it sits at around 8mil sP for 100 CSC. And you can occasionally find it on sale at a rate of 35mil sP to 500 CSC and it generally maintains that sale rate at higher amounts. But currently the rate is lower because of a site event, so go by user shop search for the time being.