Inheriting a tenant, Stove is the old PM's, Lease says no stove!

[Will Gates]

I am closing on a duplex tomorrow, and one of the tenant's has a fixed lease through July 2019.  The lease agreement specifically states that there is to be no range in the unit, but there IS one in there. 

When pressed, turns out the property manager supplied a range after the lease was signed because the tenant's sons' signed the lease (she's 80 years old), and she wanted a range.  There is no written documentation for this.

He now wants me to buy the range from him for $250 so as to not "disturb" the tenant.  I can tell it's an older model, and I have a friend that works in the industry - I could get a brand new, nicer one, for $350, or get one off of craigslist for $150 locally (also newer).   I offered him $150 for me to keep it or he can move it, and he's holding firm at $250.

Am I heartless in my opinion to let him take the range and allow the sons to supply their own if the tenant wants one?  I'm waiting for this tenant to move out so I can remodel the kitchen and increase the rent, so I really don't want to spend money on a range right now, particularly when the lease spells out that there SHOULDN'T be a range.