I agree, do it yourself. I did mine last week using the "fastguy method". Remove the passenger seat, hush panel, ecm, door motor (good advice about not breaking the white plastic clip), and support bar. The top bolt on the support bar is very difficult to get to. Its a 13mm bolt and I had to use a stubby wrench and then used a 1/2" ratchet with extension to turn the stubby wrench. (That bolt is in pretty tight and I couldn't get enough torque on it to losen it otherwise). I then removed 2 7mm screws that held some duct work on the front of the heater core box and disconnected the duct from an accordion style duct. Then I removed the 5 7mm screws holding on the cover. The top two were especially difficult to remove since they can't be seen. I had to sit on the ground and reach up on top of the cover. There is one on each side, you'll be able to touch them with a finger, but just barely. I just pretended I was blind and was eventually able to get a socket and extension on them. I didn't put the top left one back in when I put it back together! After the cover is off, you can see the core. It's held in with 2 7mm screws on the bottom. Remove the screws, disconnect the heater hoses in the engine compartment and pull out the core. You may have to cut the hoses if they've been on there a while. It took me 4 hours to get everything apart and 2 hours to get it back together. Now that I know what I'm doing, I'm sure I could do the whole job in about 4 hours, which is what the local mechanic quoted me for labor. He also said it'd come to about $350 total which is what gave me the courage to do it myself. I spent $70 on the core and about $30 on different size extensions, u-joints, etc. I didn't end up using all the tools I bought, but I like buying tools and I still saved $250. The job wasn't nearly as bad as I expected. Different years may be harder. It took me longer to replace my water pump or intake manifold gaskets.

Good Luck,
Ron