you actually have two options from dish:
1. 100 bucks for the 811, then 5 dollars per month lease
2. 50 bucks trade in for a 6000, which they will credit you 25 dollars when they receive the 6000, then 5 dollars per month lease
a better deal would be to buy an 811 on ebay between 160 to 200 dollars, and if you own a 6000 sell it for 150 on ebay