Apparently you cannot use the 180 seconds of buy time to get a ton of money and use the in-game autobuy function to buy items that are restricted normally.  I had used this method to buy the auto-sniper as a ct.

Wont use restricted guns again on the warlords servers using the autobuy function.

In-game name

"Harrowing"

Steam id:
STEAM_0:1:6132608