Autogeek does have a wide selection of stuff. But they do not carry some brands and items that I use so I still have to shop other vendors to pick those items up.
Also, their shipping costs are insane if you just need a few small items. Once you'd built up an arsenal of detailing products, you only need a few things here and there. Autogeek's shipping prices make that undesirable. When it costs $15 to ship a $10 item, that is just wrong.