Blue Book of Pianos - a good place to start learning the value of different pianos. Is the piano you are looking at really on sale? ww.bluebookofpianos.com/ (if asked for a password click cancel)
The Piano Technicians Guild - This association is not tied to any dealer or manufacturer. It is a good place to find unbiased information. Tuners must pass several tests before becoming members. We strongly urge you to choose a tuner that is a member. http://www.ptg.org/
PhilBondi RPT - Our piano tuners web site philbondi.com