WTS: Panasonic Toughbook CF-C1 rugged tablet PC in Buangkok Crescent, Northeast Singapore for sale

I'm selling my Toughbook CF C1 laptop that can convert into tablet.
or trade with macbook pro 15" with at least core i5 specs
Laptop Specs:
http://www.pcworld.idg.com.au/review/panasonic/toughbook_cf-c1/383763/specs/
Laptop Features:
http://www.youtube.com/watch?hl=en-GB&v=XNq1pM2Zjgk&gl=SG
Toughbook Test:
http://www.youtube.com/watch?hl=en-GB&v=XNq1pM2Zjgk&gl=SG
Note:
- Core i5 processor, 250GB hard disk, RAM upgraded to 6GB
- Built-in Wifi sometimes disconnects to wifi, so I used USB wireless adapter and disabled the built in wifi
- I lost the power adapter, so bought compatible power adapter
- some signs of wear and tear, scratches
Bought these for $3,300, 3 years ago.
Now selling it for $1000 only (negotiable)
Reason for Selling: hardly use it and need the money for other things.