Wow, I made an account to download the BoM and that coffee table’s total price of materials is $1108 and the end table is $1378. I was expecting less than half that.
If I have to almost design my coffee table from scratch, including sawing all the pieces to length, then I don't really expect the parts to cost much more than $30. The real investment was my time...
You can buy 8020 compatible stuff from other retailers for much cheaper.