Free duckweed - A small envelope portion :) shipping is 75c . Claim it here and I'll PM you later.
Salvinia may also be present if requested...
I also have a small Jar of Guppy grass. This stem plant can be planted or left floating, and grows very fast, is a good ammonia sink (though probably not as good as duck weed!)
$3 for all + $1.50 shipping
annndddd 10 free Ramshorn snails...( take as many as you need) none of these lay eggs yet, so they wont breed if you only buy 1
$2.50 shipping ( I still have to figure this out :P) They only breed fast if you have excess food or algae in tanks. if you feed your fish with no excess these guys will grow very slowly.
I can probably ship single snails in envelopes for $1.50 shipping