is there any getting the classic flap bags or reissues on sale

no reissues don't go on sale I dont think.
e/w doesn't either.

classic flaps do (but its usually very strange colors and usually the tiny size one only) not the regular sizes basically.
The only way I know of to potentially get a discount on these bags is to buy somewhere like Saks or Bloomies where they give you a percentage off for opening a charge account with them. But be sure to check the policy before you do this because sometimes certain designers or "leased boutiques" are excluded.
actually, nordstroms did have a sale on "classics" there were two bags, one black the other tan colored, gold sized.

The grey denim classic i got with silver hardware is a medium sized. originally 1695$