Mikel Merino

He was loaned by Newcastle from Borussia with an obligation to buy for €7m, but this isn't reflected in the updates?

Someone has to submit it and provide the proof ...

http://www.chroniclelive.co.uk/sport/football/transfer-news/details-newcastles-mikel-merino-deal-13412581

"Merino arrives on Tyneside as a work-in-progress but a player that Rafa Benitez thinks will improve under his tutelage. And he certainly fits in what appears to be a limited budget, with Newcastle paying £2.7million to the Bundesliga side for a season-long loan with a permanent fee of a further £6.5million teed up to complete the deal."

http://www.bvb.de/News/Uebersicht/Mikel-Merino-auf-Leihbasis-zu-Newcastle-United

Borussia Dortmunds Mittelfeldspieler Mikel Merino (21) wechselt auf Leihbasis in die Premier League zu Aufsteiger Newcastle United. Mit dem englischen Klub wurde eine verpflichtende Kaufoption für den Fall vereinbart, dass Merino eine festgelegte Anzahl von Pflichtspielen absolviert.


Borussia Dortmund midfielder Mikel Merino (21) will move on loan to the premier league Newcastle United. An obligatory purchase option was agreed with the English club in the event that Merino completes a fixed number of compulsory games.

--
That's the main local paper close to NUFC with prices, and the official Borussia Dortmund website confirming the obligatory purchase option.