s 202 Item <item_id> <price> <description>\n
--- Get Users' Balances ---
-c ENUM_USERS[ min:<balance>][ max:<balance>][ flags:<flagset>][ lastseen:<unix_timestamp>][ sort:<field>[-desc]]\n
+c ENUM_USERS[ min_balance:<balance>][ max_balance:<balance>][ flags:<flagset>][ last_seen_before:<unix_timestamp>][ last_seen_after:<unix_timestamp>][ sort:<field>[-desc]]\n
s 201 Users <count>\n
s 202 User <username> <balance> <flags>\n
...