1980 Defevr 41
Not specifically that boat or a Defevr but I looked for a 44 before we bought our Albin 43 Sundeck.
I'd say first if you can find a Sundeck grab it. Defevr are notoriously a good boat but, that is BUT, it all depends on how many previous owners and how each maintained the boat.
Then, any 80's trawler will need maintenence. Ongoing maintenence. Boats with good bones and good maintenance records will be keepers ones you fall in love with will be keepers (kind of like wives) and the reason for that is you won't mind as much spending the money to do it.
If you've seen the boat and you are serious about her she has probably spoken to you so you are stuck.
Have fun & enjoy.