Just a comment on why the bigger drivers are more expensive.

For example a 1/16th driver cost about $17 and the 1/8th version of the same driver is $42.

The 1/8th driver is: Twice as as tall. Twice as wide. Twice as deep. That translates into 8x more volume and thats 8x more resin.

The mould also has the same 8x more material in it, not to mention time and effort to add extra details, but it does not last any longer than the little ones.

My catalogScale Parts: Drivers and Engines