[Heafis123]

1. Are the only differences between the 2013 and 2012 demons internal?

2. How much are 2012 demons w/ 2013 internals worth?

[Reaper (ACI)]

1. Yes, but it's a significant difference.

2. However much you can convince somebody to pay for one.

Retail of a 2012 was $1050
Upgrade is $200

Retail of the 2013 is $1200
But it comes with a leather case too.

Extrapolate your value from that.