Browsing my local guitar shop I came across a used Dr. Z Prescription ES 2X12 combo for $1000. Its in great looking shape. I played it and it sounds amazing. Seriously toying with the notion of snatching this one up. Aside from the fact that it sounds terrific, the thought hits me that this amp is also a bit of a rare find, seeing as how the good Doc no longer makes them. Anybody think this amp would be worth grabbing up as an investment? Any chance it could be worth more down the road as a possible rare/collectors piece?