If you are a little handy and not afraid of doing a few very minor adjustments might I suggest urbanic 070s https://www.amazon.com/gp/product/B084S362N5/ref=ppx_yo_dt_b_asin_title_o02_s00?ie=UTF8&psc=1 it is a flat bur single dose grinder. You are basically getting a $6-$700 grinder for $200 because you will do the fine tuning yourself. I brew espresso daily and it has done a fantastic job with the fine grind required. You can fin a lot of youtube videos about them but the best by far is by lance hedrick https://www.youtube.com/watch?v=1EeJ4qHgSuA&t=116s he also does a few videos on how to fine tune them. Previously i was using an oxo conical bur grinder wich was great but the flat bur design allows for a much finer grind ideal for moka pots and espresso. I ordered on amazon because of the cheaper shipping, direct from their website the grinder is cheaper but the shipping cost and lag time, at the time, made their amazon store cheaper.