I have a 1996 Blazer LS with all factory radios and dashboard. I would get a AVIC-D3 but I do not know if it will be good. Someone knows if it will fit, I will do custom fitting for her. Thank you.
This is a picture of the dashboard of cars. This is the exact car.

http://tinypic.com/view.php?

Doing that would definitely fit require cutting of both the telescope and the edge structure in-dash. This is not only the height is a problem, the depth is greater than the factory radio as well. I suggest using a single DIN unit like the AVIC-N3, with the appropriate mounting.

Edit: Actually, the factory radio comes with a pocket mounted on board that can be removed for more space, so you probably would not be cutting-edge piece before, after all, you might really need to find a way to fill a moat around the new head unit.I'm sure you'll still have to cut some structure to the panel at the rear to handle the issue in depth editing, however, and it would be difficult to look good in the dash.

I want to buy a Pioneer AVIC-D3 but the lowest price I can find online is $699 from TrustedDealers.com and I don't want to buy it from eBay. Where else can I buy it for cheaper? Are there any other cheaper sites?

Personally, I wouldn't recommend buying something that expensive online. You never know if you are getting a refurb or not. Also, it is difficult to get something warrantied online.

A trusted local car audio shop with a good reputation is your best bet. Ebay may be scary, but by using ebay and paypal, you have alot more protection than just an ordinary website. Paypal is pretty ruthless when it comes to fraud, plus, you can kinda judge the seller by their feedback.