Well yeah, that's always the big question mark. What's not a question mark, is that his value (as for every player over 30) will start declining quite soon. You'd basically be signing him at the worst possible time.
From a sporting point of view, there's not much to argue about. From a financial (or economic, if you want) point of view, it makes little sense.
Haven't been following the transfer news that closely, so I don't know how real the RVP rumours are. But I personally think there's absolutely no way that we'll spend this much on a (foreign

) 28 year old player in the last year of his contract.
While some of our recent moves on the market may not always have been a success on the field, there was usually sound financial thinking behind it (spreading costs, minimizing risks, net overall costs, (potential) sales value, etc). And I can't quite see how that would relate to RVP.