Sweetwater offers the Blackstar HT Studio 20 20-watt Guitar Combo Amplifier in Black, model no. HTSTUD20C, for $349.99 with free shipping. (Guitar Center charges the same.) That's the lowest total price we could find by $100. It features onboard digital reverb, Infinite Shape Feature, two foot-switchable channels, a one-way footswitch, 12" Celestion speaker, and effects loop with level switch.