As you already have the rank, yes it will only cost an additional $10 USD to upgrade to VIP. To do so go to the store page here: https://www.seriousgmod.com/store/ttt Purchase VIP. The price will be preset to $20 USD which may confuse you but it will change it to $10 USD to suit what you have already got on your account when you go to checkout. Now you can just check your payment method and follow through and you'll have VIP.
