Originally Posted by Lapsus

D) Previewing Flames:
.....III) Flame IDs must be posted any time a flame is being sold (e.g. the first post of selling threads and any other posts in buying threads). See this post for how to check the flame ID.
I) All auction, buying, and sales threads must clearly state which forms of payment are being accepted/offered, for example "TC only" or "high-value items". Failure to comply with this rule will result in the closure of your thread. Also note that posts inquiring about the preferred payment option are treated as useless, and punished accordingly.