Hi Kim - I guess I would just like to second something Marcia touched on. I have been using my used printed copy of Year 1 this year - as is. I have had no problem finding out of print books at the library or on one of the many sites out there. I have not felt the need for anything upgraded at this time as I have been able to locate all of the resources I need - so far. I am like you in that I like to have a printed copy in hand, and just plan to work off the printed copy I have. A coop is not something in my plan at this time, and I only use TOG for UG and LG at this time. I love that the option of upgrading to DE is out there too - for the future. So for me, right now, this works. I agree that it may be a little stressful trying to stitch old and new together right away. I think you need to consider if you plan to use it in a coop, if you are okay with using the printed copy as it, if you are okay with just trying things out with the printed copy (with the option to upgrade to DE in the future after you have tried using TOG), or if you think you could go with the DE only edition and print things up as you need (which is really a tremendous price if you are okay with working from a screen - it lasts forever, and is always current with the ability to get the older stuff too). I guess those were a few of the things I contemplated before my decision to buy used.
Blessings - Lynn