Somewhere around £20 I think? So maybe 30$? I bought it many years ago, so can't remember. I think I deleted the original eBay account I bought it on so I can't even check it, I can try to check my current account if I bought it on this one, but I doubt it?
The Japanese are just really humble/appreciative generally though. They hate receiving tips for example and have such a high trust, generous and polite society. Even if it a lot of it can be a facade unsurprisingly sadly.