I sell regularly on GB and had not heard that. The article quoted is strictly about STATE SALES tax and says nothing about IRS, Feds, or 1099s. Are you possibly mistaken about the $600 & 1099s, or did you mean to quote a different article? It seems to me that, if GB had made ths change, they would have notified me about it. There was talk last year about *** Obiden wanting to get IRS involved in all money exchanges of $600 or more, but AFAIK that absurd idea died long ago.Big problem Federal Government has stepped in on January 1, 2022....GunBroker will send you a 1099 for your 2022 Income Tax for any amount over $600 for the year....so you are going to pay income tax weather you make or loose money on selling....
Also GunBroker has a fee they charge the Buyer on every sale.....