Kind of fixed

[klongrich 0]

this fixed it but looks horrible

private void ExchangeCowhides(){
    if (!GrandexchangeLocation.contains(getLocalPlayer())) {
        getWalking().walk(GrandexchangeLocation.getRandomTile());
    } else {

        exchangComplete = false;

        while(!exchangComplete) {
            if (getInventory().contains("Hard leather"))
                sellCowhides();
            else {
                buyCowhides();
                exchangComplete = true;
            }
        }
    }
}

[Defiled 415]

Good Job!

But why are you looping a boolean inside the onLoop?

You could just add 

&& exchangComplete == false

inside the if statement, then it'll check that condition each time the onLoop loops depending on the time you set in the return statement in the onLoop.

and yeah, always check if the walker should walk to avoid spammy map clicking.

Other than that, Congrats on getting it to work!

[klongrich 0]

Ohh It was just habit. We had a norm which was like rules to the way we write code so we could all read it quicker and we couldn't define things in constructors. Would be a simpler way though. I just ended up doing this instead. 

private void ExchangeCowhides(){
    if (!GrandexchangeLocation.contains(getLocalPlayer())) {
        getWalking().walk(GrandexchangeLocation.getRandomTile());
    } else {
        sleepUntil(() -> !sellHardLeather(), 10000);
        buyCowhides();
    }
}