It seams the price is very high.
1Mh/s LTC = $999 per year
Currently mining with 1MH/s (if the difficulty doesn't raise) mine about 63LTC per year (about $643 at this moment) http://www.coinwarz.com/calculators/litecoin-mining-calculator/?h=1000.00&p=0&pc=0&pf=0.00&d=5808.74098238&r=50.00000000&er=0.02535000&btcer=401.70000000&hc=0.00
The BTC price might go up, but I do not think so (it is another topic).