Average value of a piano like this Yamaha Baby Grand Piano in 2012 was estimated USD of $8,000-$20,000, historical always appreciating it's own value,at least keeping up with inflation.
A Steinway and Sons grand piano average prices ranges from $30,000 to $80,000. Classical Instruments do not diminish in value over time. Quality made classical instruments like Pianos, Violins, Guitars consistently holds their value over time, often modestly increasing in value.
Digital Pianos are popular these days, ranging from $500-$5,000. Digital pianos are nice because they have weighted keys just like real pianos, so you can play dynamics (pressure sensitive keys so you can play hard or soft notes).
This is the main distinction from a keyboard, that only plays notes without dynamics. But keyboards are cheap, portable and great for practicing. Decent keyboards range from $150-$300 and can easily be bought online.
The moral of the story is it can't hurt to invest a few thousand bucks into a few classical instruments. A nice piano always brings a nice classy touch anywhere. And 20 to 50 years from now, your investments, if kept in good condition, will absolutely hold its value, but it could double or triple in value too. They sure don't make things like they used too.
Quality craftsmanship in making classical instruments is a slowly dying breed of business. So if you have the opportunity to Get a real piano, (sometimes people give them away) take it!
I predict that in 50 years, the value of quality made classical instruments, like pianos, could be 100x more valuable, due to the fact that they will become rare and scarce, quickly becoming very high value antique items in the world.
Ludwig van Beethoven - "Tempest" Piano Sonata N º 17 in D minor, Op. 31, No.. . 2
Daniel Barenboim in Berlin. Movements: I. Largo - Allegro
v1.02 Revised 9/8/14 2235 dw