You're only missing Fair Warning and Diver Down.
Fair Warning - Mean Streets, Unchained, Hear About It Later, So This is Love. Some of my favourite VH tracks on there but let down by some weird keyboard shit songs IMO. The darkest VH album. It used to be my favourite for a while, it's been over taken by the 3 albums that came before it.
Diver Down - Pretty Woman, The Full Bug, Little Guitars, Where Have All The Good Times Gone. Good album, the weakest with Dave IMO, fair few covers on there, but worth it for Little Guitars and The Full bug alone.
Wouldn't expect you to have to pay more than a few dollars each for them new. Regularly £5 each in the UK, cheaper online.
Complete the 6 pack!