Ok so I walked into my local music store, and lo and behold there is an old all-tube Mesa Buster 210 combo laying on the floor for sale for $500 even. I plugged in and was blown away. What was even cooler was the luggage handle and wheels! It needs it, as it weighs about 100 pounds. The tone was amazing, everything seemed to be in working order, and It was just retubed, has all original paperwork and everything. Is $500 a good price for this amp?