And my recommendation is sell everything you pull right now. Sell, sell, sell. Build up your coins. Right now I have around 170k with more stuff to sell (25 max items in your trade pile is a joke, btw). No reason to build a team right now. Sell everything while the value is the highest. If you pull a Hagelin for example and really want him for your team, sell him now for 7k and buy him back in a week or 10 days for 2k.
My plan is to keep building up my coins this weekend, then on launch when the market is flooded start doing collections. Use those freebie players from collection packs to build my team. Rinse, repeat. You'll end up with a really solid squad to play with AND a ton of coins.