When exalts were 70 fg in beta, divines were roughly 500 fg
Idk if that means anything cos they might change drop rates or attract more players with new characters and flood market with more drops resulting in lower prices.
On my last playthrough I dropped Divine orb in Geonor in Normal difficulty. If something like that happens again on reset, I would probably be able to sell it for fg and by the time I reach act4, exchange it for 2-2.5divines.
Prices drop rapidly after they're established in first few days
Depends really, I've seen some nasty players that tell anybody who starts lowering div prices to "knock it off" or "stop devaluing the prices" while constantly reporting anyone that calls out his antics (it's a flipper engaging in this malicious but apparently allowed behaviour, haven't been engaging in trade here ever since but one thing I noticed is that user count here started dropping even faster after the event that gave me my %10)
Be wary of what a flipper would say, and always remember that prices aren't supposed to stay exactly the same for a whole god damned week (but but muh market blahblah. Eat shit, that's just an excuse to prey on the ignorant, fuck off!)