However his agent said: "West Ham bought Marko for peanuts".
Shelvey has only made 12 appearances for Newcastle this season and this week went to Barcelona for treatment for a thigh problem.
It was believed that West Ham were ready to offer the Catalans giants £20 million for the services of the Spain worldwide, but a source inside the London Stadium poured scorn on that notion.
The other huge sticking point, however, is that Newcastle boss Rafa Benitez would not sanction the sale of a midfielder, whose value would be in the region of £20million, unless he was able to bring in a suitable replacement.
Arnautovic's brother Danijel, who also acts as his representative, revealed that the player wants to leave and urged West Ham to sell.
"Yes, the hosts have conceded at least once in their last eight home Premier League games and I would be surprised if the Hammers kept a clean sheet this weekend, but Manuel Pellegrini has never finished on the losing side against Unai Emery in six previous home league games (W4 D2)".
"It is his great desire that West Ham accept the offer from China. They paid £20m for him, which is nothing in the current market", read a statement from Danijel to talkSPORT.
Now he is back in the Premier League and he can not believe how things have turned around for him.
Shanghai SIPG are the side said to be interested and have reportedly offered a wage packet of £200,000 per week over a four-year deal. He wants to go to a new market and challenge for titles. It is close to double what they paid for him. At the moment we have no news about him.
Since arriving from Stoke City in summer 2017, Arnautovic has established himself as a key player at West Ham.
Will be hard to replace but i trust Pellegrini to do it. [tomster36]This whole thing about Arnautovic is annoying!
He said: They are rumours.
Despite his brother's revelations, West Ham's stance on the matter is unlikely to change unless, like former star Dimitri Payet, he refuses to play for the club - something that would be totally out of character for a player renowned for giving his all on the pitch. Marko in this moment is a player of our team.