Here are some Transformer pics I have picked up of the net.

Decepticon leaders

Cross Hairs

Hot Rod

A3 or alpha trion

Crystal City (Omega Supreme once guarded this city before the constructicons smashed it)

Huffer

abominus

Prowl Dieing! a sad day for transformers

hun-gurrr

Alpha Trion

Decepticon HQ

Kup

The Ark

Decepticon Planes

Matrix

Old Autobot Head Quaters Before They Left Cybertron

Dinobots

Megatron

Blaster

Gears

Menasor

Cerebros

Goldbug

Misfire

Computron

Guardian robots

Nightstick

Counterpunch

Highbrow

Octane