online used car marketplace appropriate for drupal?

I was at Drupal PDX today. Being new to Drupal it was very informative, very helpful... Great bunch of geeks! Very interesting to know that drupal.org is hosted just ten miles away! We will definately be using Drupal for many projects in the future!

Question I'm still wondering about is in the context of Drupal and a site called http://oregoncars247.com, a site I started two years ago as I was cutting my teeth with PHP/MySQL. I sure would like to ditch the authentication system for Drupals. Many other modules I'd like to take advantage of.

One hurdle would be that the Drupal image module doesn't do watermarks yet. I use phpThumbs. I can't do without the watermarks, but it sounds like I can still use phpThumbs within Drupal.

I guess my biggest concern is the SEO. I am dynamically setting the title tags and h1 tags and meta tags for each individual listing (such as "Used 1998 Ford Explorer for sale in Albany, Oregon") which is working pretty well. I guess what I'm really wondering is how difficult is it going to be to migrate the dynamic nature of this site (http://oregoncars247.com) to Drupal.

Perhaps the answer lies with CCK... And/or perhaps we would need to develop a module? I hope I don't sound like I'm not reading the manual. I've done some reading, and went to Drupal PDX, but I'm still not sure. I'm sure that one of the Drupal Gods could look at the site and tell me in just a few minutes if I'm barking up the wrong tree. I guess that we will learn enough about Drupal in coming months to make that decision a few months down the road.. But with proper input it would be cool to make that decision sooner! Espescially if the answer is "you bet, Drupal would be great for that"! :)

Thanks you to the folks who did Drupal PDX today!

Go Drupal!
Go Beavers!