I have a 95 Dutchman 22 Ft 5er - They defiantely hold up well if taken care of! That thing is long - will be a PITA to pull! I'd say that price if in good condition is a great deal!
go to NADA . com and check out the value of that model -- put in all the options it has and you will have a value to go off of! The one I checked was a Dutchman Classic Series M 36ft TT and it was low retail @ 6400..... that was w/o any options checked - just standard