You'd be surprised how hard it is to find good rocks even in Central Park. I ended up "borrowing" 2 chunks from a local garden for my turtle cage, but they aren't anything to write home about.
The problem with NYC is, everything you do someone else has already done 5000000 times before, so all of the good rocks are long gone.
Safado, yeah, one of those flat rate boxes would hold enough for at least 5 10gallon tanks
The look I'm going for in the tank is a not quite amano deal, with eventually a nice carpet of something around 2-3 rocks, the centermost being larger but probably less interesting than the two that skirt it on the sides.
I want something with some character, either something volcanic looking with some crags and nice texture, or something layered but not smooth, like a sedimentary hillside you'd see on a highway, but in miniature
Those amano rocks are probably overpriced to begin with even in Italy or wherever they ship from, I can't imagine what it would cost to actually order some to the US.
The rock thing is tricky, I have what I know know is I guess some gypsum in my tank now, and while it looks neat, I have noticed like someone pointed out that it is in fact dissolving, undoubtedly messing with the solubility of my water