The MSRP on that trailer was $14.5K. It could have been purchased new for roughly 25%-33% off of that or around $10K. NADA says the current average retail value is $7.5K, so it's sounds like a reasonable price.
2014 Jayco Jay Flight Swift SLX Series M-184 BH Prices and Used Values | NADAguides
Look up the towing specs on your Nissan Frontier. It can be anyplace between 3500 lbs to 6500 lbs depending on how it's configured. Then compare it to what the trailer weighs. The 2625 lbs is with the trailer empty. Water is 8.34 lbs per gallon or 217 lbs for your 26 gallons. Add another 20 pounds of propane. Then add your clothes, food, bedding, towels, plates, silverware, pots and pans, cooking utensils etc... So it's very easy to hit or exceed that 3500 lbs of a low end Nissan Frontier. If your Frontier is rated at something greater it should not be a problem.
Note: The trailer is only rated for a maximum of 3500 lbs fully loaded.
Now where you live and where you plan to tow can make a big difference. With a fully loaded trailer you have effectively doubled the weight of your vehicle. Towing in the mountains might be an issue, is your V6 up to the task? Also in the great planes like North and South Dakota, Colorado, Wyoming, Nevada, Utah it is not unusual to have constant winds in the 20-30 mph range. If it's a head wind this is a huge load on your vehicle. So there is no simple answer as to whether your Nissan Frontier will be adequate as a tow vehicle. I towed our 23RB with a Dodge Durango V6 (290hp) for two years and over the winter upgraded to a Durango with a V8 (360hp) and it made a world of difference. Towing in the mountains and plains is much easier with the larger V8.
Weights & Measures
WeightsUnloaded Vehicle Weight (lbs)
2,625Dry Hitch Weight (lbs)
315Gross Vehicle Weight Rating (lbs)
3,500Cargo Carrying Capacity (lbs)
875MeasurementsExterior Width85"Exterior Height104"Interior Height73"Bunk Beds30 x 76Sofa24 x 64Wheel Base161-5/16"Tank CapacitiesWater Heater26Gray Waste Water Capacity (gals)15Black Waste Water Capacity (gals)9OtherSleeping Capacity4-5