In most of the businesses we sell in our business brokerage the parties do not use lawyers except to prepare closing documents. The typical cost is $1500 which the parties split.
That said, I said “most”. Many of our clients do use attorney’s to review docs or prepare contracts and I have seen some abusive bills from attorneys making things far more complex than they need to be. All in all, I do not suggest using an attorney to reach/negotiate the deal but we do suggest that an attorney look things over. For a reviewing a 30K equipment sale and for the lease assignment I can’t see it running over 2-3 hours time.