because he wants it cheaper. Gold is easily worth about 100fg per 1k. nothing wrong with him or anyone else trying to get a deal. I made quite a bit of my FG from DND eariler seasons, usually hit demigod quit playing then let my gold/items rot. He isn't wrong IMO and you aren't either.
I get where he’s coming from but almost every common currency is priced at around the price you can buy it for with $$ online