After figuring out the name brand, style and size of doors I needed, I called every place in the phone book (Internet) that dealt with selling interior doors and I found a store with incredibly low prices.
It only took about an hour of my time to make some phone calls. I was so surprised about the price being so low that I had to ask them twice if the price was right.
Check every corner and when you think you’ve called them all, find more stores to call. It really pays to go that extra mile when it comes to saving money.