This year's cut-off should be a little high because the paper was too easy. Since the seats are only 60 and almost 15,000 students appeared for BLAT 2017. Hence there are complete chances that the Cut-off will be High.
Now talking about the numbers, Past two year's cut off was approx 300 marks for General Candidates. Although paper of past 2 years were not this simple as this year's was. Hence I think this year it may cross even 320–330 (For General). F.Y.I. The seats for General category is not 60, ITs 28. Remaining seats are reserved for SCs, STs and OBCs.