As mentioned elsewhere, you might want to indicate what you consider a "reasonable" price.
Also look it up in your owners manual and post the max towing capacity for your year and model Caravan. I looked, and the range for them is between 1800 & 3200 lbs, depending on year model and equipment.
On top of that, the Chrysler transaxle has not developed a reputation for reliability.
BTW: Many of us hereabouts go by factory posted towing specs, not what Joe at the local trailer hitch shop recommends.