Have not seen this, but the more info you have, the better to make a decision.
Wouldn't hurt to google around for Pre-Delivery Inspection (PDI) checklist--several are out there for free and the items should all be pertinent to new or used.
And be careful of any dealer that charges for a PDI on a used unit--it should be inspected and ready for sale free of charge, or listed 'as-is'
2016 Tiffin 40 QBH
2015 38RSSA, traded
2005 TK3 #1869, 10 yrs of memories,
2017 F450 KR--one more Ford is it
2009 F450 4x4-died; 2010 F450-retired