I tried signing up as a seller. You have to pay $15 a month as a seller and this is charged upfront before they "verify" you. In the verification process it requires your phone number. Mine was not compatible. I asked why and was told I need a national carrier with a SIM card. Problem is, my phone is T-Mobile with a SIM card, so it meets the requirements. After a back and forth with what seems to be an AI Customer Service Agent (not human), I attempted with another phone number, also a national carrier with SIM card. I got the same result. After a couple of weeks of back and forth they told me Customer Service addressed my issue and they can't resolve. Haven't refunded my $15 either. If signing up I would check first if your phone number is acceptable or you might lose 2 weeks of your life plus $15. Case # 13547392