Hope you're making progress with the sale. From my perspective I've just bought a GT, and I specifically looked for the Cloverleaf model simply because I'm not a fan of the Blackline alloys.
When looking the most important thing to me was a strong service history and indications that the owner was an enthusiast who kept on top of the maintenance. E.g. previous owner changed the oil every 6000 miles, which I have continued to do. Put plenty of emphasis on the preventative maintenance you've done, not just the bits that you replaced because they broke.
Speak softly and carry a big stick.