I was charged 150 dollars for an assembly that I timed, with two men, taking under two minutes. Between pulling in, carrying the couch ten feet, assembling it, and leaving, they were less than twenty minutes. Some of that time was spent checking phones before getting out of truck. Etc.  no complaint with the guys, btw. They were great and didn’t set the price or recommend assembly. Wayfair did. 
This is by far my biggest complaint with Wayfair. They were misleading. The couch is assembled, other than sliding the back pieces onto the base. I could have done it in maybe 3-4 minutes myself.
I feel as ripped off as I have in recent memory.
If not for my satisfaction with a multitude of other products, I might stop buying from Wayfair because of the greed and dishonesty in this instance.