Bid List for Lowe's and Home Depot

[Preston Roach]

We are working on our first flip house right now. I have heard on several podcasts that it is a good idea to take a "bid list" to Lowe's and Home Depot's Pro-Desks for their best prices. I am wondering how specific the list needs to be for the best results. Can it be as simple as:

3 Small Ceiling Fans

1 Large Ceiling Fan

1 Stainless Steel Dishwasher

1 Stainless Steel Electric Oven

1 Toilet

1 Kitchen Sink with Hardware

1 Garbage Disposal

etc...

Do I need to be more exact with each item's size, colors, and brand? Thanks for any help!