@ could always set the price at $19.99 USD and lower it if need be at a later date as it’s easier to lower a price over raising it from a consumers point of view unless of course additional value is added to the pack at a later date to justify the added price bump.
Anyway,
I’m just basing this off general advice I’ve heard from Michael Allar and others on the Unreal Slackers Slack group + elsewhere regarding their responses to various upcoming marketplace developers questions about what prices they should set for their asset packs.