2006 Sunline CLASSIC Series M-286 - 29' Standard Equipment, Prices & Specs - NADAguides
Having it on consignment at a dealer doesn't always help get it sold. What dealer was it? They need good visibility and they have to charge a good amount to consign or else the salesmen will have no incentive to show her trailer over one that the dealer owns and the salesman can make more commission on.
It is my experience that most people will take out a loan on something over $10,000, so that could be why you haven't had any interest from Craigslist. Car dealers use it a lot with higher priced items, but people can go to the dealer and possibly arrange financing there.
It looks in very good condition in the pictures, so don't jump on lowering the price too much. It still has the stickers in the sink...
Another option you could try is eBay. I honestly don't follow the sales that much, I just see them when they're first listed and then ignore them later, so I don't know how the sale closure rate is there. You can make just a classified ad on there for a set price if you don't want to do an auction setting.
2007 T-286SR Cherry/Granola, #6236, original owner, current mileage: 9473.8 (as of 6/18/21)
1997 T-2653 Blue Denim, #5471
1979 12 1/2' MC, Beige & Avocado, #4639
Past Sunlines: '97 T-2653 #5089, '94 T-2251, '86 T-1550, '94 T-2363, '98 T-270SR