I tried several plugins before finding this but they all were missing something… However, this one does all the things I was looking for: to limit the maximum price when Cash on delivery is available and especially to support both free local pickup and paid postal COD service. All that with just one plugin with one easy configuration page!
WooCommerce Smart COD PRO – Your favourite, 5 star rated, WooCommerce COD plugin, now enhanced with a ton of new features!