I just got these off Amazon based on a recommendation in this sub or /selfbarber:

JW CT PROFESSIONAL HAIR CUTTING SHEARS COMBO (5.75) https://www.amazon.com/dp/B086PJ8GR9/ref=cm_sw_r_cp_api_i_OrW5EbEK5QB7G

It’s $49 for the set. I’m a total amateur and have only used them on two cuts, but I can say these sliced through hair like it was nothing compared to the shears that came with my clippers. Those seemed to struggle with a single strand of hair. The thinning shears are especially nice, as it’s hard to find ones with a lot of teeth (lower cut rate) for blending at a reasonable cost.

I also like that the shears are part of a larger catalog, which made me feel a little better that the company wasn't some fly-by-night operation:

http://www.jwshears.com/images/JW-Catalog-2020.pdf

Hope that helps.