Answer:
Electronic pianos are usually least expensive, but they don't have the rich, warm and subtle nuance and sound that a acoustic (or as you say percussion) piano can make. Usually, good electronic pianos range from 1,000 to 2,000$, medium end straight acoustic pianos range from 3,000 to 7,000 while high end go up to 14,000 - 17,000$ and good grand pianos go from 8,000 to 20,000$ and the most expensive concert pianos can go upward a 100,000$.
Even though the electric pianos are cheaper it is worth spending a bit more for a percussion piano. (Minor detail: when you learn off a percussion piano you have a lot more chance of being able to tell exactly what note is being played.)
There is also a completely different feel to a percussion piano that is worth getting used to.