Yeah, they are nice to have! I got my set of factory service manuals off E-Bay for under $30 and will say it is the best $30 I have spent in a long time. I also got all of the brochures for my year, and won an auction for like $2 for a hodge-podge of GM manuals, TSB's and such. I had bid on it on a whim, and only paid around $5 with shipping. Most of it was worthless to me and dealt with Front Driver stuff, but it had a copy of GM's service parts identification decoder book that made it well worth every penny I paid! Not only that, but one of the books also explained GM's CCC computer carb setup and it's theory which was also really cool to have. I also have part of a set of 82 manuals in worn condition I got cheap too, again I bid on them because no one else was and the auction was almost over for under $10.