This is a huge plus.I just add what I need at McMaster-Carr to my shopping cart, and when it gets large enough or I have something in there that I need the next day, I buy it. I like that it keeps my cart for weeks, there are some places that if I haven’t purchased in a few hours, it empties the cart.
When I'm working, I add items 4 or 5 times a day as we design things and place the order when it gets big enough.
When I'm between jobs, I'll build a wish list and order it when things pick back up!