If you live in the Bay Area join SFBAAPS, we just had a meet and I got so many plants! I cant wait till I have my bigger tank so I can have more plants. Oh I also got free wood which was awesome! I'm bread everyone was super nice even though I am new.
Moss also grows slow, unless you are in a club, it is going to be expensive.
You can post a listing once you get into SFBAAPS for dwarf sag, there was tons at yesterday's meet actually.