Invitation or Limo Deals thru Tuxes?

I've heard that it is often possible to get a Tux place to throw in invitations or a Limo when you rent from them. I have not come across this deal yet - does anyone know if this exists? Also, can you negotiate the rental price?

becareful who these limos are, choose wisely. everyone here can help you decide if they are a reputable limo vendor or not.
Good Luck