500 silver = 4.99€ / 1000 silver + 100 silver bonus = 9.99€ / 2000 silver + 300 silver bonus = 19.99€
I'm pretty sure you can change € with $ and £ as well.
EDIT : 400 Silver for free from Bungie
Costs per Emote :
200 rare ( 16x )
500 legendary ( 2x ) Carlton and Slowclap
18 emotes total.
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20 dollars, is that how much a dlc cost already for an individual?