DVI-D - DVI Digital (True Digital) DVI-D is a direct digital connection between your video card and your monitor. This type of connection provides a fast transfer rate, high quality image and no quality loss due to the fact that all signals from PC's are purely digital; no digital-analog-digital conversion is needed.
Typical costs: 1  A half-size keyboard with training software averages $200-$250. Expect to pay $550-$2,000 or more for a full (88 keys) digital piano keyboard with touch-sensitive keys and a damper pedal. 2  Beat-up traditional pianos are often available for $250-$500.
As for brand new, expect to spend between $1000 and $2000. I have a Yamaha S-90 (discontinued, but they make other newer versions, as well as other models). It's a great professional keyboard (great piano, as well as every other instrument sound). I think it was around $2100 brand new. I also have a Casio Privia, another great keyboard that is similar in many ways to my Yamaha. The Privia goes for around $900 brand new.