Well they don't make these like they used too!!!  I have put 50 pounds of weights on the bottom so it doesn't tip over for my 10 pound cat.  This replaced one I had for years - the bottom alone weighed more than this whole condo.  And it isn't just Wayfair - I looked all over - in stores and on line.  If you have an old sturdy cat condo - KEEP it - just re-carpet it or re-string it.  I wish I had.