Smart move getting a 48-hour test drive. When checking a used EV, really focus on the battery health. A friend of mine learned the hard way. Ask for the car's charging history if possible, and check for any significant degradation. See if you can get the dealer or seller to run a battery diagnostic test. Drive it at various speeds and in different modes to see how the range holds up, and test all the charging ports and speeds.
And then make sure all the tech works like the screens, voice control, everything. Check for any unusual noises during regen braking and acceleration. Also, look for any signs of water damage, especially around the charging ports and battery area. Don't forget to check the tire wear, as performance EVs can go through tires quickly. Oh, and make sure any software updates are current, and ask about any remaining warranty coverage. Good luck, and hope you score a good one!