Used - depends on condition. You can find some great deals on used rigs that are in great condition. At the same time you can find someone's problem child they are trying to get rid of. Inspect it top to bottom, front to rear, side to side. Or have someone do it for you.
New - Google that Heartland model number and look at prices from multiple nation wide dealers. You may well find dealers with much lower prices for the same floor plan that you can either buy from, or use as a bargaining tool for your local dealer.