Congrats!! Does the 91 op have a pension, matching 401-k, and good job security? Do you think they will NEVER sell the plane?
These are some things to ponder... Also consider this- You have the potential to be promoted to GS-14 within a few short years. That is 6 figures with an 18 year pay scale that tops out at $130K (2014 rate). Also, that does not include Cost of Living adjustments that "could" bump up your pay each year.