Hi guys
I found this double DW5000 pedal in a local listing, and was wondering if a more experienced pair of eyes could help me determine the following, by looking at the attached photos:

1. Is it an Accelerator or Turbo?
2. What generation is it? The owner says they bought it new in 2015
3. What does it lack (if anything) compared to the latest generation DW 5000
4. What would you say is a fair price, if in good condition?