Keep reading to find out how...
Step 1: Costume Materials
1) Thick black hair and beard (Free - $30)
If you're a dude with dark hair and a beard already, then you've got it made! For the truly authentic look, you may want to throw some gel in your hair and slick it back.
If you're not naturally equipped with Billy Mays features, don't despair. You can buy fake beards and wigs online or at your local Party Supply store.
Any sort of long-sleeved blue button-up shirt will do. The important part is to print out the logo (Attached below) and tape it to the upper left side of your shirt. I'd recommend using double-sided scotch tape for a non-permanent attachment.
Billy always left the top two buttons undone with a crisp white undershirt underneath.
3) Khaki pants (Free - $30)
Simple khaki pants, preferably pleated, with a brown belt.
4) OxiClean prop (Tub or Spray Bottle) (Free - $10)
Perhaps you already use OxiClean and have the bottle laying around? If not, most pharmacies or department stores will have a variety of shapes and sizes to choose from.
5) Watch(Free - $20)
Billy always wore a watch... You could probably get away without this detail, but if you have one - put it on!
Step 2: Put It All Together!
Congratulations - you are now Billy Mays!
BUT WAIT, THERE'S MORE!
Here's a couple tips to really make the most of your Billy Mays experience:
Tip #1) Remember, ALWAYS talk in a loud voice and start every conversation with "HI, BILLY MAYS HERE!"
Tip #2) Give lots of Thumbs Up's!
Tip #3) Watch a couple YouTube videos, like this one, to get you in the spirit: http://www.youtube.com/watch?v=ZTpXh33Mbeg
Tip #4) "Sell" the product! If somebody spills wine on the floor, for instance - Billy Mays and OxiClean to the rescue!
Tip #5) This costume can be adapted to any of your favorite Billy Mays products (Mighty Mend-It, Big City Slider Station, OrangeGlo, etc.) Just change the logo and grab a different prop!