$200 dollar Driver or $100 dollar putter???

I have a starter golf set from Dicks Sporting Goods. I have fallen in love with the game and want to start replacing clubs (I have bought a few wedges) should I replace my putter or driver first? I only have about $200 to spend right now, so my question is should I buy a putter and a low iron(my lowest is 6) or should I buy a cheap driver? I was going to buy used just because I don’t have any experience with buying used sports equipment!Thanks in advance, Love, Me

Golftown will be having there Demo Sale on November 2nd so you might want to go in there to see
but my opinion is the putter is used the most, i would replace that first