I bought a black chanel clutch bag, quilted, lambskin I think. I got mine on ebay, slightly used, but it still looks quite nice. I think I paid about $500.
I am no expert on Chanel, but you can obtain items used on ebay that are still legit. I would just ask some of the Chanel experts what to look for. I can sort of tell, if they show pics of the inside. They are usually burgandy.
I just bought a pink goatskin Chanel bucket-type bag used on ebay as well. I got it under $300. I've learned a little about cleaning leather and even lining from this bag hobbie. It looks like the pink bag is going to be great for summer. It sort of has a cute vintage look.
Also,
www.turnaboutshop.com sells used, authentic Chanel everything, I got two sweater sets from them.