Amazon has Porter Cable 382 5" Orbital Sander on Sale for $29.98 with Free Shipping.
Dual plane counter
100% ball bearing construction
Provides maximum sanding speed for smooth finishes
Dual-plane counter-balanced fan reduces user fatigue
Dust-sealed switch protects against dust ingestion for longer switch life
Controlled finishing system maintains controllable pad speed and minimizes gouging during start up
Lowe's also has Porter Cable 382 5" Orbital Sander for $29.98 with Free Shipping for MyLowe's Members (free to join) or Free Store Pickup where available.