Instant purchase is OK. I want to sell these, so I can't offer significant discounts, but I will consider price negotiations. In that case, I will only respond to requests for price reductions. Please purchase within 24 hours of the price reduction. If the deadline passes, I will return the price to its original value. Returns and exchanges are not accepted after shipping. This is a used item that has been used several times. If you are concerned, please refrain from purchasing. If you have any questions, please feel free to ask.