I have a Zamp 200w portable but checking the prices online recently and some stores have really gone up in price.
I did find this RV dealer in Wyoming with better prices
Here is a review
For a single battery you could get away with a Renogy 100w panel at $300 or less. I purchased mine this time last year and it was still $800 now its
You can purchase a separate panel, controller and cable and make your own.
2008 Classic 25fb "Silver Mistress"
2015 Ram 2500 6.7L Cummins. Crew Cab, 4x4, Silver
2010 Tundra 5.7L, Double Cab, 2wd, White