You will never make mistake if you order TCredits, even if it is only one, which will give you 102 VP.
But if you are able the best deal is TCredit Pack of 125 TCredits, for 36.25$, with that you have 1 500 VP + 100 VP for setting SO, guaranteed EA rank and possibility to earn more VP and MRP with bidding on auctions ( 1 bid is 1 VP and 5/10 MRP), winning auctions, rewarding your downline etc.
