[Verdoro 68]

Wondering if these quality as the "decent" $160 mics mgarblik mentioned?

https://www.summitracing.com/parts/cbi-50070

I've been perusing used Mitutoyo and Starrett mics on eBay. The seem to be anywhere from $70-$200 for a set, although most used sets don't have a 3-4". Anything to watch out for with used mics? Are digital read outs worth it?

How about a dial bore indicator? Seems like most of the sub $200 ones are .0005 accuracy. Is that sufficient for bearing clearances when the mics go to .0001?