What type of side steps do you mean - factory ones or aftermarket?
Assuming it's factory, then no $100 isn't that great of a deal - they should be about $50 (of free if you can find someone here to give you their's). wrangler factory steps | eBay
As to will it fit, yes, they should. They mount by just drilling holes in the frame where you want them mounted (from the factory they have holes drilled, with nut inserts pushed into the hole).
I have a set in my workshop that I removed from a friend's TJ. If you can wait a week I will take picture of them. If you want them just pay the shipping from Georgia to you and they're yours.