I wonder how i can find a cheep used control for my electric wheelchair?

Question

the chair is a inovacare pronto sure step and the control number is

MK 4 RII JOY STICK I DROPPED IT AND NOW THE CHAIR IS NOT USABLE ANY MORE

Answer 1

Find the largest powerchair dealer in your area and ask them if they have a used, rebuilt, or other cheap controller. My vendor usually has a bucket of them they use as loaners while the real controllers are rebuilt.

Also, ask any organization that collects chairs for re-distribution, such as Presbyterian Outreach. They often have piles of odd parts laying around.

Answer 2

Ebay

Answer 3

cheep (n.) A faint, shrill sound like that of a young bird; a chirp.

I assume you mean "cheap"?

cheap (adj.) Relatively low in cost; inexpensive or comparatively inexpensive

I doubt you will find that part anywhere but a dealer.  Here's a link to one that has another link for parts, good luck.