u/Firm-Tomatillo-1429

I am about to pull the gun on my first e scooter an iscooter ix3 and I had a few concerns the one i’m looking at is a cheaper price then regular market because it’s rear tire has sealant added but is slipping against the tire i’m not entirely sure what this means and I want to know if the fix is easy to do or not (it’s 200 below regular used market price)