A simple work around to this is to have 2 concurrent sales of items. That are completely independent of each other.
If I agree to buy one of your eve online char corpse’s for 20bn ISK due to our assumed value then this is fine.
If at the same time you decide to buy a picture of mycat in real life for £30 sent by email then that is also fine & not of CCP’s concern.
No RMT has taken place in the above statement & no online eve rules were broken so they will have zero reason to ban you.
If anyone disagree’s with me they are being moronic. If such a case was RMT then I have plenty of RMT to report as I’ve seen hundreds of Eve players buy each other drinks in real life bars and then trade spaceships & other assets later that week in game. Clearly RMT is a foot there too.