Shortly after I got back into fish, rich311k posted some wisteria clippings in the "trade" section. I expected me to send him postage and some $, and him to send me some plant clippings eventually.
Er, I got them the next day, a huge wad of gorgeous crispy plants, and he refused to let me pay him a dime. He said to enjoy them, and that one day I'd be sending out clippings myself. That seemed hard to believe.
A year or so later, I've sent clippings and snails and shrimp and so forth all over the place, often with the same "enjoy them...." message and no money needed. It's one of my favorite things about the hobby, spreading the aquarium love. The people here are so generous-with their time and their "stuff"- and so helpful. Big round of applause.
And your tank looks just beautiful, by the way!!