Yeah... that's why I had to paint the foundation, the windows (white parts), and now the roof too. The one set I bought was new in box, the other was used. The used one probably wouldn't look all that yellowed except that I'm putting it together with the new in box house. 
Oh well... I like painting.  

Edit to add: I'm not a smoker hater... I smoke. But, I smoke outside so I don't wreck my stuff. 
