Hello:

The Korg PA50 is relative a new keyboard, the PA 50 is a current model.
The Roland G1000 is a great keyboard, but is from the mid 90s...so, is a descontinued model, even still sounds good, but is an older technology. The MAP of the PA 50 is $999.00 and the G1000, well, ebay probably can tell you, but depends in the conditions, usage, etc...If it was for me, is most likely that I go for the PA50, warranty, support, parts....I hope it helps you.