Most drop services don't want to monkey around and manage the stupid nonsense of all the price differences between each so called "premium" name versus garden variety ones and depends on niche, character length, etc and each registry has their own pricing. For example "Your(.)finance" would be a premium registration likely. But Joes(.)finance would likely be some minimum charge.
Whereas .org, .com, .net all have fixed prices until contract changes. .io and a couple others deal in expired, but I don't remember their names.