If you can wait till the spring time when the 2017 models come out, you can get a better deal obviously. I think last year when the 2016 came out, the 2015 models could be had around 78ish without much problem. Since your deal includes your trade in, the deal isn't just dependent on your lowest sales price, but also your trade in.
As far as issues, we purchased a 9 month old 2015 30DS and have had very little issues. Granted windshield has a spider crack on the LH side caused by delamination (known issue with 2015) and the stair motor went out this past trip ($80 part). Just remember this is an entry level class A. If you understand that, thats half the battle. Good luck on the wheelin dealin.