Pre-owned which bag to buy, help!

Hello ladies,
Need advice for a newbie! I posted a thread on buying a distressed gold bag and whether its suitable for spring/summer. I got great answers and found more preowned bags to choose from. I already have a black everyday and black mini, I would like to find a great dinner bag and not pay retail right now... budget constraints!

if you could take a look at these and give me your opinion as to the winner i'd so appreciate it! Can't see them in person so I really need help, scary buying online!

thanks!
http://luxury.malleries.com/chanel-lambskin-double-flap-bag-paris-limited-edition-i-27247-s-336.html

http://luxury.malleries.com/auth-chanel-07a-le-marais-light-gold-leather-flap-bag-i-25919-s-259.html

http://www.chaneltouch.com/products/Authentic-Chanel--2.55-Navy-Blue-Double-Flap-Bag--#3561265.html

http://www.yoogiscloset.com/chanel-dark-navy-blue-quilted-lambskin-east-west-classic-flap-bag.aspx