Musician’s Friend has Epiphone Limited Edition Les Paul Traditional PRO-II and PRO (all models) for sale for $399:
Epiphone Limited Edition Les Paul Traditional PRO-II
Epiphone Limited Edition Les Paul Traditional PRO
Certain PRO models were on sale for $299, but popular finishes such as Desert Burst have never reached that point.
Alternatively, Guitar Center has 25% off coupon SUMMER for the PRO version ($374.25 AC):
Epiphone Limited Edition Les Paul Traditional PRO