Dota 2 - Second pudge persona set - easy way of making steam market money 

Well this is very outdated but you could create alts to get free 5 keys, buy chests from market, trade the chests to them, use the keys to open chests, gift the sets back to your account, trade up the sets to get pudge/io and finally sell them on market for easy money
Also no duplicates so if you get pudge set first, you get 100% io item next. The third time is random 50/50

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