I think Chelsea set a selling price too high for Lukaku which in the end was very difficult for Inter to accept. Lukaku is still good, but I don't think his value is higher than 30 million euros, but Chelsea want Inter to pay more. Loan options are being discussed, but it seems Chelsea just want to sell rather than put him on loan again.
Chelsea has been decreasing his price a lot. It's not possible anymore for the club to decrease it even further. Chelsea bought lukaku from interimlan with 100m but chelsea was selling him for less than a half from such price.
Chelsea suffers huge lose even if intermilan gonna take this offer. I think that it's an excellent decision for intermilan to rebuy him again from chelsea. These teams are having so many stories about lukaku.
Chelsea sell him then re buy him and wanna sell lukaku back again to the intermilan.
Inter have so far not looked like they are going to force Lukaku's transfer at the value asked by Chelsea, that's because Inter seem to want to save a lot of money for other plans. Chelsea had to make a tough decision about Lukaku but I think 30 million euros is a good value for a 30 year old striker.
Inter will not rush it even though intermilan's ceo has been confirming if lukaku was the priority of club right now. I think that the negotiation gonna happen between chelsea and intermilan.
Chelsea has not yet talked with intermilan regarding what's gonna be the best price for him. That being said that if lukaku's transfer back to the intermilan is far to happen but it can be finished asap as long as chelsea will be lowering its offer.