Welcome to the Darkside :-D You'll find that your best bet is to look in the FS section here. Prices and selection is good and shipping often cheap (unlike what you may be used to in reefing).
What size tank? Lighting CO2?
You'll likely want to look out for:
Anubias Nana (petite as well)
Marsalia (minuta preferred but quad also ok)
Crypt Willisii, Crypt Lucens x Willisii
Those can all tollerate low light/no CO2 but will grow very slow in those conditions. They are small and easy to get in the FS section.