I mean, sometimes low hours really is low hours. Not everyone is out to scam. Some of us hobbyists accumulate lots of gear and don't give certain pieces much use for a very long time 😅
But the 5SE has lost a fair bit of market value since the 6 (and now 6SE) has been out for several years, and people seem to prefer the 6 by a lot. I definitely seem to recall units offered at 6500 sitting for a long time, even if minty. I sold my first Ref 6 for 8500 - probably well worth that $2K stretch. $6K seems OK if you don't want to stretch and really want to try it.