Lily Petals for 40K ... yeah, don't think you'll get takers on that. However, collectibles ARE a decent source of plat as they are selling fairly well on the AH currently.
A few other low-level things to do includes farming for stuff that's fairly easy to get, but that some folks will buy instead of spending the time to farm up themselves.
(shop your local AH for price ranges for your server):
Farm Durk's for Muckbanes. Those are still selling fairly well.
http://ddowiki.com/page/Durk%27s_Got_A_Secret
Farm 3BC rare Strinati for his rune-arm Strinati's Hand Cannon. I have had those sell for 25K up to 65K on AH.
http://ddowiki.com/page/Cannoneer_Strinati
Farm Relic of a Sovereign Past for Adamantine Ore. Ore is used with the Stone of Change for the Adamantine Ritual.
http://ddowiki.com/page/A_Relic_of_a_Sovereign_Past
Stuff like that.