Possibly buying a used Bullitt with steps, what should I watch out for?

I tried out a Larry vs Harry Bullit with a Shimano steps 6000, about 2 years old. Before I commit to it, I wanted know if there is anything I should watch out for? It comes with the rear wheel lock, a side panel kit, honeycomp board with a roll top. Dynemo hub with a front light. I test rode it today, might pick it up tomorrow, the asking price is $5500. So far everything checks out, the lady that was selling it seem really cool and just has too many bikes so she is just swapping out for something else.