Need advice on an inherited collection.

I recently inherited my father's collection of Transformers toys. They range from Generation 1 up to recent ones. The majority of his collection is out of the box but basically positioned on a shelf and left alone for years. I'm really not sure what to do with it. I was going to post in the selling thread but I haven't catalogued them all yet. It is a hefty job to say the least. But I'm not really sure what I am looking at or dealing with in this amount.