Amazon.com offers 70% off or more on select men's skate shoes. Shipping starts around $5, or get free shipping on orders of $25 or more.
Notables:
DC Men's Villain Sneakers from $14.89
C1RCA Men's Al50 Sneaker from $14.99
Osiris Men's Troma Ii Skate Shoe from $15.59
Vox Footwear Men's Trooper Skate Shoe from $17.09
etnies Men's Fader Sneaker from $17.99