It would depend on the design. If you get rough measurements of your kitchen you can work it out from the online price
We did an IKEA kitchen nearly 2yrs ago. I used the online planner and played for weeks tweaking the design til I was completely happy with it. Price was exactly as per planner. Ask for a quick tutorial if you're not confident. It is'U' shaped and 3.4 X 3.7m. Other than 2 corner units all were soft close drawers (8 units) with hidden internals also had 8 overhead cupboards. Total without bench was under 7K. Similar Bunnings would have been $10-12 with many less drawers, and custom closer to $20.
Loved it so much we are going to use IKEA in our new 1930's cottage.