Yeah the "shopping around" aspect isn't even close these days. I remember ~25 years ago using price aggregator sites to pick up individual PC parts from all different websites.
Today the situation is flipped. It isn't difficult to find a really good price. If you buy all your parts from the same retailer, you'll be way closer to the minmaxed optimal price than in the past.
The problem is that right now the "good" prices are crazy.