The argument about not knowing what Callahan and Girardi are going to command for their next contracts, isn't really an argument at all. In fact, all it does it lend an excuse (and a poor one at that) to dithering on the situations.
These are going to be 2 coveted guys on the market. They are going to get more years and more money than was has been deemed "reasonable" around here, which is usually 5 years/5 - 5.5M per. Theres a very small chance they will take some sort of hometown discount.
If you're making this type of argument, you're setting yourself up to be shocked by the insanity of the UFA market come the summer, which is strange considering the myriad of players the Rangers themselves have overpaid.
Fans who are advocating some sort of other avenue are the ones that don't want to be caught with their pants down in July surprised and shocked by the price for these guys.