I don't see that error, though I know at one time those patches were 175 coins. Try clearing your cache and see if its still there.
They were back on sale back during Kirby's 20th Anniversary, which Google told me was back in 2012. I thought it was my browser too but I checked it in Chrome incognito mode and in IE and it was still there. It's gone now so I guess I guess it was nothing. I probably would have purchased it at the sale price though since I have 500ish coins expiring the end of this CN year.