Too expensive??

The price of my model is way too high. I am using blender and I do not know how to make my model smaller. How can I reduce the size? I attached the file, and it's a WIP so don't judge

You could scale it down. Hit the S key and type in your scale. .75 to do 3/4 scale and so on.

I already have it the size I want it. I just need to make the object hollow or something, but I am not sure how to do it. I tried making a box inside of it and making a boolean difference, but that didn't bring the price far enough. And the price was $10,000 and brought down to $500. It is a 5.6 w x 8.8 d x 4.1 h object.