Nicely done!!
I'm all about free and/or cheep terrain, over the past bunch of years I've collected tons of materials ranging from packaging styrofoam/cardboard to leftovers from job sites to interesting bits and pieces from here and there. Although as of late I've been ransacking my local game store for all the Battlefield in a Box terrain and since I'm in good with the owner he's been giving me anywhere between 15-25% off everything that I purchase. Not a bad deal at all but since I have limited space to store my terrain I'm going to have to get rid of most of my stuff
Anyways I like what you have so far keep churning it out
Weez