In closing, I'd like to remind you that your best protection against buyer's remorse is having the piano inspected by a piano technician prior to purchasing it, particularly if the piano is more than ten years old. Sometimes it will be sufficient to speak to the seller's technician about the piano, if he or she has serviced it regularly and has reason to believe that he or she will continue servicing it under your ownership. However, in most situations, you'll be better off hiring your own technician. You can find a list of Registered Piano Technicians in your area on the website of the Piano Technicians Guild, www.ptg.org.
If you're serious about buying a used piano, additional information in The Piano Book may be useful to you, including:
SPRING 2010 -- page 67
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Hybrid & Player Pianos