I actually heard of a site from someone here called www.spoilmykitty.com
I got free shipping! and 10% off my order and it was a heck of a lot cheaper to begin with than getting it from a store. I got a tree that goes for $175 at the stores for 60 bucks. Nice
I was skeptical at first, but i guess they wholesale or something so they can sell for less.
Also the amarakat site, they make most of the furniture you would see in stores, they have low cost stuff, but i think you pay shipping...which for a heavy tree can cost a bit. My tree was an amarakat tree but i got it from the spoil my kitty site. Easy to assemble too.