I was just the same when I first started. I find something for 10% and I felt like I was on top of the world. Now that I find more contacts and more deals, 10% to me is just like chump change. It just barely cover the tax rate (9% CA). Ever since I been on Brickpicker I was able to get the clearance and more knowledge on how much should you pay for a set to make decent amount of money. It's amazing how much other people know on here. Also finding people on Craigslist to buy exclusives from isn't too bad either. I was able to get some exclusives for 40 - 50% off. The bottom line is that once you taste the 30%, 50% or even 70%, you're not gonna want to go to 10%. It's just not worth it anymore.