Skivvy scam

I was checking my email this morning and opened one from Express with the subject line: Free panty--three days only! Am I one to turn down something free? Absolutely not. So I go to the website, punch in the promotion code and go to the online checkout to get my $7.50 unmentionables fo' free. But wait! Shipping and handling costs $8. Psh. Rule of thumb: if it sounds too good to be true, then it is.