Out of the three cat trees I have, the Molly and Friends is by far the most well constructed and sturdy. It was the most expensive as well. I've gotten everything through Amazon US.

If you live near a Costco and are a member, or have a friend that is, I got a great 6 foot, three level cat tree that is solid and heavy and handmade in the USA last week for $67.99. The company that makes them is Beatrise, here is their web site http://beatrisepet.com/ They had a similar one last Christmas for about the same price but when I went back 2 days after I saw it they were sold out and I was told they only come in twice a year and that they sell out very fast. I have one that is nearing the end of it's life so this one is basic but a great buy, here are a couple of the styles that have been carried IN Costco that range from $50-$69 when you can find them. They also carry a different line if you shop online with them.

This is the one I got in-store at Costco except it has two of the poles covered partially in sisal rope for scratching: http://beatrisepet.com/content/triple-stacker-cat-bed

This is the one they had at Christmas for about the same price and it had sisal on it also: http://www.google.com/imgres?imgurl=htt ... Bg&dur=146

Good luck in your search.

We purchased our tree at Costco as well. I bought it before we picked up Quasar. Hubby made me leave the tags on it because he didn't believe Q would even want to use it. Q loves it! He has a perch from which to view most of the action on our main floor. He can also stalk the dog, and people, from it.
It has 3 levels and the posts are wrapped with sisal rope.

We just bought another one from Amazon that arrived yesterday. It is waiting for assembly in our living room right now. We are having a couple of living room chairs reupholstered and I'm hoping this furniture will give him a diversion from them.

By the way, the tags came off the Costco tree!

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~ Kyenta

got mine from ebay for cheap

I bought Diego's cat tree and scratching post from here: http://www.petplanet.co.uk/category.asp?dept_id=816 they also have really good value toys and good food brands at really good prices :)

I bought the Molly and Friends Simple Sleeper. http://www.amazon.com/Molly-Friends-Sle ... rees+molly

I wanted something shorter because it's going under a window. The tree is solidly constructed and doesn't move an inch when the cat jumps up on it. I've bought two other ones and with one of them, the tree falls over when he jumps down from it. A little top heavy, so need to find something to weigh it down. I also like the Amarkat trees.