one (1) drop of 91 million runes for 100 fg per drop
Or
five (5) drops of 91 million runes (over 455 million runes total) for 400 fg
I can trade to any elden ring xbox platform, so all xbox one and all xbox series consoles, but my current drop limit at any given time is 5 drops
One last thing, you will need to have the duelist's furled finger on you to conduct these trades. It is very easy to aquire, from warmaster's shack in limgrave simply head north up the path to limgrave colloseum and the duelists furled finger is right in front of the main limgrave colloseum gates.