No idea what its worth but youd probably get more if you return it to standard and flog the good bits on ebay.
On the new bike front Iv had a few of the bikes you are interested in. A pair of vstroms a varadero a 955i tiger and duc multistrada,definately would score the africa twin off the list as they are getting a bit long in the tooth not that fast and the seats a plank. Got to admit they still look fantastic though.
The most comfortable for me was the varadero its big and heavy but goes well for a fat lass. The early ones are 5 speed and carb the later ones 6 speed and fi. Read all sorts of horror stories that the early model are thirsty but I didnt find it too bad . The linked breaks make you lazy as i hardly ever used the front when a press on the back would provide plenty of stopping power
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Would test ride as many as you can and see what you like best.
Cheers Allan
Would recommend you test ride a few and see what you like most.