Look down from the 'ass' of the tele to make sure the neck is straight. It won't be straight, it should have a subtle C shape, but you can spot twists or warps or wavy spots. I can see the damn high fret on my uke doing this. Play every fret for buzzes. The pots and switch are not worth worrying about imo. Look at the nut to see how it's cut, that there is no plastic coming off on either the headstock side or fretboard side to indicate binding or eroding of the nut. The pickups will hardly differ within the same model, I wouldn't be concerned. Note their height if the sound is a little weak (low) to harsh (high) or unbalanced (1 of each), if you're not liking the tone and it seems out of adjustment you can change it with a screw driver. I always look for a tight neck pocket. These days I hardly see any loose ones with cnc. Make sure the bridge is on straight to the neck, although if it's not it can usually be adjusted with a screwdriver. Give the neck a good strong Pete Townshend vibrato with your fretting hand to ensure the neck pocket isn't creaky and won't shift on you. Grab the neck a little more gently pull it up and down while pinning the body to your body with your arm. If you hear any wood squeal, not good (if you get too carried away it may bring you to my next point). Look for cracks around the neck pocket. I'd say 99% are just finish cracks, but it's a good method of trying to talk them down in price. The baja has good parts, you don't have much to worry about. If it sounds noisy, note where you are standing and move away from any electrical appliances, wall outlets or florescent lighting, or turn yourself 90 degrees. You can also hold it closer to those things like a TV or computer to see how well it's shielded and how quite they will stay. Fender does a good job making all their single coils quiet in my experience.
Main thing is the neck body joint. If that is good, it's likely going to be a good one. Everything else can be replaced anyway, but I would recommend not replacing anything other than the pickups (if you feel so inclined) and the nut (I always prefer bone!)
Good luck. If you're tech cant get this ones action lower you need a new tech, or a fret level.