Chinese Knock Offs is where it is at. I've purchased several sets for the wife and they are virtually indistinguishable from the real deal and a fraction of the price. This is where I pick up her sets...
https://www.yourwobb.com/
They ship from China and it takes a minute but *SO* worth it.
Example:
Lego Tree House (21318) Build - kinda...
Just built Lepin 16050 - Knockoff of Lego's "Old Fishing Store" which is now a retired set.