I hate spell components if they're not part of the plot, so we don't use them in the game. If a spell lists no value, just assume you pull a pinch of something out of somewhere, and if you're stripped, you no longer have it. If a spell lists a value that's less than half a percent of your wealth, I see above.
The only time I care is when it's something super specific or expensive. Like "a hair from the target" or "1000gp worth of [thing]".