For 18500 points (about $130)....you can get 10 token packs and if the odds for each level are equal that's 2.5 tokens per, but even conservatively at a 2 token avg, that's 20 tokens which along w the 20 team builder items would net you around 10 million coins.
If you're ever going to spend money, spend it now. You can't find coins on the secondary market for $13/m right now.
Best dollar to coin value ever, more so than the field passes