This is the deal people are usually waiting on, doesn't get much cheaper than this. I think the AMEX restriction is new, but it let me pick my free tie before I included payment info so maybe you can get away with it? Their phone CS is great if you have any issues.
One fitted non-iron shirt + tie was $39.50 shipped for me.
Offer expires 5/12.
There are various instructions in-thread on how to stack coupons, but as some are reporting these orders are being cancelled...I'll take them out of the OP.