CK5 - The Full-Size GM Off Road Community

is there an online blue book reference guide for older model trucks ( '72 Blazer)?

No such thing. Review the ads at <a target="_blank" href=http://www.traderonline.com>http://www.traderonline.com</a> to establish current prices.

Getting a true value quote on an older vehicle is hard to do. You have to look out in the market for your area and determine what yours is worth. There are so many varibles on it that it is a difficult job. It is very difficult to find 3 or 4 other trucks the same year in approximately the same shape as yours in an area, but that is what you need to do.
You can also find a collector and ask him or her to shoot you an offer, you can bet it will be a lowball though.

John

There's also a publication called Old Cars Price Guied (krause Publishing) <a target="_blank" href=http://www.collect.com/interest/periodical.asp?Pub=PG>www.collect.com/interest/periodical.asp?Pub=PG</a> . They are a great resource for values, have a "condition" guide, and do include trucks. Check them out!
Ressurection.