Well, I will be the contrarian. I say sell it. I am not a fan of vintage, which is another word for dated and used.
The point of wearing luxury goods is being fashionable, and for me, fashionable means being in the current season. The vintage bag you have looks dated and it is not puffy the ones are today. I know it's 22K gold plated, but honestly, so what? It's not like it's a 22K solid gold, it's just plated and not worth much. It's like having a 22K gold plated necklace... it's just plated and worth anything in terms of real monetary gold value.
Aside from the gold plating which doesn't factor at all for me... I honestly think the bags look very dated.
When you wear it, it will look like an old Chanel, and possibly come across as a fake. For me, I would rather have a brand new, current season, puffy quilt Chanel anyday. Hands down. It's much more fashionable, and after all, we buy Chanel to be fashionable and stylish.
Just my two cents.