Chanel and affordable don't belong in the same sentence I'm afraid but....you can score a vintage Jumbo for under 3k in very good condition from most reputable consignment boutiques fashionphile, yoogis, etc.
I have not tried the reseller route, but definitely love both the mini flap and the clutch on a chain. Both have classic styling at a more affordable price. Price range is 2200 to 2600. HTH! Good luck!
What is your budget? I have to say Chanel is by no means affordable so please don't put yourself in debt just have a Chanel.
There's a lot of beautiful vintage Chanel on the re-seller market, just make sure to get it authenticated by one of the lovely ladies on TPF before you purchase it. You should be able to find one between $2-3k.