Worry less about marks and scratches and more about bevels/correct brushing still being present and a sharp case with fat lugs.
You can take scratches out with a valet but you can't stick metal lost through over polishing back on.
Check if the bracelet stretch is bad or reasonable. If bad look closely at the inside of the lugs to see if the top bracelet link has worn any metal away from there. Inner lugs should be parallel with no flare at the bottom.
Look and see if hands have been replaced at service - e.g. Tritium swapped for luminova if it should be a trit model and check that the lume plots are all present and correct.
If it is papered check that the serial matches.