I paid taxes on what I sold in 2017..
I told H&R block that I got them at a 0 zero cost basis and I've had them for more than a year, the truth, and they gave me audit insurance on it so if the IRS wants to question it H&R block can pay for it and deal with it..

It kinda drew attention in there and their were 3 of em with me when I warned them that if it's wrong they are going to have to deal with like 3 million transactions..