Because we are not in the PL, Levy would likely to sell Eriksen to us than to a PL rival.
-Modric went to Real for 30 million pound in 2012 (contract ran till 2016)
-Bale to Madrid for around 77 million pound in 2013 (contract ran till 2016).
With some factors such as the Neymar inflation, 2 year left on his contract, Levy factor and he is not a household name like Bale and Kane, I think Eriksen would cost around 110-120 million pounds with some variables attached to it. I think Eriksen will lower his wages so that Barca can facilitate the move like Coutinho did.