Sheriff Sale Purchase and the occupier won't leave in Philly

[Lamarr Gaddy]

I purchased a property in June 2015 and the son of the owner won't vacate.  I was told by the city because he is challenging the validity of the sheriff's sale it is now a civil matter.  The court date is in November and I don't want to wait any longer.   Would it be worth it to hire an attorney or should I just wait for the November court date.   I've offered him up to 1000.00 to vacate and he hasn't budged. He has absolutely no income and I am now responsible for this year's taxes and water Bill's.