Their is no possibility that this deal is ever going to happen because of his age, they are building for the future and vigil van dijk is too old for that, he should just stay put and renew at Liverpool where he is highly appreciated and adored, though he is a very good player and not all club will want be willing to pass on the opportunity to sign him into their team but due to his age, it would be very difficult to secure a big move away from Liverpool because he is almost past his prime, and these clubs knows that the highest number of years he can be able to deliver at the top level is just for a season, and that is what they are not looking for, they are thinking long term when making acquisition and players that can also get a sales value if they decide to cash in, so as we can all see, van dijk doesn't falls into such category of what they are actually looking for, even though he has the skills and qualities required.
Where he can get a very big deal and the kind of contract he is looking for is at Saudi Arabia, because this might be his last contract, so I would suggest to him to go for the money now he still has a little bit of value in the market.