My full price one from Amazon has arrived. I emailed them on Tuesday to say (paraphrasing) “An hour after I bought this you were selling them for £115, so I don’t want to pay £429. Can you refund me the difference, or should I just send it back?”. They replied to say they understood my concern, and were waiting for some info, and would get back to me by Friday. Yesterday they emailed again to say sorry, but we’re still researching the issue, but will get back to me by the 30th. Their returns cut-off is 30 days so there’s no issue with waiting, and all credit to them for their communication. I’m not so much as unsealing the box until I hear what they’re going to do though! If they come back with some kind of in-between offer (i.e. offer to sell it for £150 or something) that I don’t want, then I’ll post on here in case anyone else wants it before sending it back.