Excellent buy. We have had several of the Esties and have done all of the restoration on each. IF you have (or have access to) an ultrasonic cleaner it will help tremendously. While I might not buy one for just one pen, if you decide you want to be able to do your own work then it's a great investment.
That being said - DO NOT LEAVE the Estie in HOT water for any extended period of time. It will discolor the material and you will have a heck of a buffing job on your hands (yup the voice of experience - thankfully though we were able to fix the oops on that one.)
Since you have already gotten past the hard part - a few things to be aware of.....
Number 16 Sacs - available at many many places, in my opinion, should be the good Latex sacs that are available. You will want some sac talc to keep the sac from sticking to the walls of the pen, small tray (if there is one in any given Estie) and metal bar. If the J-Bar in the pen is already bad - these can also be purchased at a low rate and are VERY easy to replace. As others have said - you can get Estie nibs pretty good prices and it's a good idea to try several out. We have gotten several pens that people seemed to have done their own "adjustments" too and have found them hacked so badly as to take a "firm fine" to an oblique by cutting it off and/or filing it off - was hard to tell.
These are great pens to learn on. You'll want something to clean it up most likely and there are a few good products for that as well. Sac Shellac - goes a long way and seems to last forever so if mixing your own make just a little bit (or get a small bottle with a brush and put the spare into that.) One note on using sac shellac - practice putting your sacs on a couple of times so you can do quickly and it won't dry on you while trying to work it up into place!
That is a great little pen - can't wait to see it when you have finished it all up.
[URL="http://www.Indy-Pen-Dance.com"]Indy-Pen-Dance[/URL] - FP Inks, Journals , Sacs, Vintage FPs