Staffa, bwnbwn, what the sales person offered to do was take the less expensive item back for a refund and sell me the more expensive for $120, two-thirds of its regular retail price. My guess is $120 is about what their cost is for the more expensive item.
That seems like a fair offer. If I had made a mistake and showed a $180 item priced at $67, I would have a hard time offering to switch the $67 item for the $180 item. I haven't made that kind of mistake before, and I hope I never do.