I know I post alot of these ebay listings. But $235 is a pretty good deal for this amp - the quality Reverb makes it much more giggable than a Danelectro 1482 or other similar vintage combo. Stock speakers are not so hot in these so I'd replace it with a Weber. Makes it alot louder too.
http://cgi.ebay.com/1967-Gibson-guitar-TUBE-amplifier-HAWK-vintage_W0QQitemZ270146656049QQihZ017QQcategoryZ121161QQrdZ1QQcmdZViewItem
I played through one of these at a local shop recently and the real tube Reverb was very nice - though the Tremolo only has Speed (no intensity knob). If the amp is stock it should probably have a pair of 6BQ5's in it.