Number made was 300 not 500.
Chip Rack price is based on known sales (ignoring any freak results). $175 is probably a fair value for up to 50 known.
We don't do quantities in TCR so not sure what you are suggesting is 'under-estimated'.
Also bear in mind that many Reno collectors also collect Sparks so you cant really it compare it with other 'small towns'.
Likewise there are 'crown' collectors.