I feel your pain DD. I was doing this manually back in 2001 on a Excell sheet. To keep it fresh, I'd add more and more rows of comments and copy-paste it together. After a while, I wanted it to speak to the shopper rather than just gettin' in done. That's when I built the "model" that you see below.
Here it is DD:
example: The Used Car King TV - Used 2010 Chevrolet Cobalt 4dr Sdn LT w/2LTNear Syracuse, NY
Vehicle Comments:
This 2010 Chevrolet Cobalt has the sought after LT w/2LT trim and also has the upgraded Sport Appearance Pkg! You can do it! Only $245p/mo with ZERO down*! Hot options are: traction control, bluetooth, rear spoiler, xm radio, antilock brakes, premium ride suspension, and onstar. Buying a small car like this 2010 Chevrolet Cobalt is just plain smart. Trade in that tired ol' car, you're going to get 33 MPG on the open road and with only 14,098 miles, you can expect to enjoy years of trouble free use. *Call us for more details
CG BreakDown:
The [brackets] you see below are a call to insert data. Data is pulled from anywhere I can find it. From the VDP, from my pre-built comment lists, from where ever you can find interesting info. Here is the example:
Vehicle Comments:
This [year][make][model] has the sought after [trim] trim and also has the upgraded [insert special pkg if equipped]! [if unit is < $25,000, insert random ra-ra fluff to setup payment]! Only $[payment calc]/mo with ZERO down*! Hot options are: [Matches from Hot Options List]. [insert vehicle segment fluff comment]. [if MPG >28, insert high MPG comment] [if miles <36000, insert low miles comment] *Call us for more details
Nuttin' to it, just a lil' bit of science and a lil bit of Uncle Joe's marketing magic. 
