That kit has the oversized drum shells, almost Bonham sizes. It should be great for rock. USA made Gretsch, keep them safe, they can't really be replaced. Gretsch still makes those sizes and color, but, the shell maker has changed. I do not believe that kit has the same value on your link, but, someone out there might overpay. Just last week a 24,14,18 in rosewood, I think it was a "stop sign" badge (SSB) for $850. The SSB is from the 70's. A cool part about Gretsch is when Fred Gretsch took back Gretsch in 1985. That's when they started to make real good drums again. The 60's round badge drums are very expensive, but, there are still deals to be found on the 80's-90's drums. I would be very conserative and say the drums in your car are at least in the $800-$1200 range. They could go higher on ebay if the right buyer has that jones. I have 2 rosewood gretsch kits, love 'em. I'm always looking at them to add to my collection, and I'm not the only one out there.
Here's the link to a recent ebay sale
http://cgi.ebay.com/Gretsch-Rosewood-Finish-Drum-Kit_W0QQitemZ180464307579QQcmdZViewItemQQptZLH_DefaultDomain_2?hash=item2a0482cd7b