We can help you identify them if you can lay them out a bit better for pictures.
For instance this picture:
From left to right:
Titans Return Fortress Maximus.
Combiner Wars Superion
Titans Return Trypticon
Combiner Wars Devastator
Energon Megatron (in front of Devastator)
Cybertron Unicron (yellow)
Cybertron Primus (ball in front of Unicron)
G1 Metroplex (looks like the Encore re-release, Japan)
Far back: Cyberton Metroplex
G1 Fortress Maximus (Again likely the Encore re-release)
In front: Movie Revenge of the Fallen Devastator
Thrilling 30 Generations Metroplex
Titans Return Weirdwolf (in a plastic case)
G1 (Walmart Exclusive re-release apparently)Hot Rod in box in front.
Outside of that, you will need to decide if you want to sell it as a complete collection, normally difficult, or part it out, and sell it by figure.
There are of course websites like BBTS, maybe Transformerland that may take the complete collection from you, and help with the sorting.