Oregon dealer with no idea how to sell cars to Washington residents. They totally fubar'd the sales tax, and when pressed with their own contract language, refused to refund all unexpended fees.
In the sales process, they asked me what my sales tax rate was. When I responded I had no idea, they picked one and I suggested that might be a bit high. They picked another and I said sounds better. They based the sale upon that. Two weeks later, they called to inform me WA DOL rejected the registration for $117 and change. When I responded it might be their problem, Rowdy said he would look into it and get back to me. When I called back to offer they refund the sales tax and fees, they had already cut a check for an arbitrary amount not including all the fees and mailed it to me without my permission. The terms and conditions on the contract we both signed clearly state:
8. The price for the motor vehicle specified on the face of this Order includes reimbursement for Federal Excise taxes, but does not include sales taxes, use taxes, or occupational taxes based on sales volume, (Federal, State, or Local) unless expressly so stated. Purchaser assumes and agrees to pay, unless prohibited by law, any such sales, use, or occupational taxes imposed on or applicable to the transaction covered by this Order, regardless of which party may have primary tax liability therefor.
... and on the "face of the order" is a line item stating "WA STATE SALES TAX" and a fixed amount, thereby releasing the customer of Washington state sales tax liability.
The fact they failed in their first registration attempt gave them no reason to expect additional funding from me. Further, they derailed my attempt at reconciliation by cutting a check for the amount of their choosing before I could state terms. In a conversation with their title manager, it was explained to me the sales tax was a "best estimate" and they usually aim high to ensure sufficient funding and refund the difference after registration. Unfortunately, that was not explained to me at the time the contract was signed, and conflicts with the written T&C on the signed document.