Local pickup for speakers - should I let the buyer in the house or use the the garage?

I got someone coming from out of town to buy some Focal tower speakers I have for sale. They are going to pay cash. I had the ad on usaudiomart (the buyer is a guest so no ratings). The guy sounds like a good guy (spoke to him on the phone). But I am new to this... should I demo the speakers (just to show they work) in my garage or is it safe to demo them in the house? Wasn’t sure the best practice for this. 

What do most do when having local pickup?