I just dug through my purchase history and pulled out some highlights below.

I've been disappointed with most mapping items I've purchased on amazon, but I'm trying this out on Thursday: https://www.amazon.com/dp/B07JL8LC9R/ref=cm_sw_r_cp_awdo_t1_lqNnCb2BCVTP2. The reviews suggest people received beat up tiles but mine are pristine.

Amazon has a lot of nice dice trays. I bought a large one more commonly used for gambling than dnd, but can't find the link.

Litko sells some fun mini stuff like https://www.amazon.com/dp/B00BFX86HU/ref=cm_sw_r_cp_awdb_t1_RrNnCb8AEJZSG.

This is my fav DM notebook: https://www.amazon.com/dp/B01M30OX7E/ref=cm_sw_r_cp_awdb_t1_EsNnCb3Y62H21.

I also purchased some lamination tools to help with paper minis from printableheroes.com. Turns out small thermal laminators are cheap, and self-seal laminating pockets can be even cheaper.

I'll add more if I can think of them!