I know this has already been said, but let me re-enforce. I believe t-credits are the best value. You can get your 1500 VP with a 125 t-credit standing order. Then you can use those credits to win the other things you want, such as s-builder co-op, or CSAs and PSAs. Plus you get VPs from bids, so you can use this to work towards BTL. If you can win a few auctions, it is far cheaper to buy the t-credits than to buy all the other things you may want.