Nah I won't spend that much money plus shipping fees for Blockclock Micro, even if I like it, but I think that Coinkite/Coldcard is ripping people off... and I understand they are trying to make a living from this.
AT $150 it's a little expensive but not out of hand. For whatever reason they are not using off the shelf parts so there is a much larger cost then just using a stock RPi zero and an off the shelf display. The rest of it does not look that bad in terms of cost. Now, why they went non 'standard' components instead of something that can be bought everywhere is a valid question. But to design & test & build what is probably going to be a limited production run item does have a cost behind it. And they are building it domestically not in China / someplace cheap so a bit more cost there too.
Kind of like the voltage goat nixie price tickers. The standard parts that make them up are not that much, the custom built items like they do...that will cost you.
Separate non BTC nixie thing but political, if you want a nixie clock order one from here: https://nixieshop.com/store.html
-Dave