That particular miner is way overpriced. Nobody should buy it at that price. The seller either listed an incorrect price, or is very confused about the current market for mining hardware, or is hoping to find a customer who is a sucker.
For comparison, the Antminer S5+ has a (claimed) hash rate about 7x higher and costs about 1/4 as much, making it about 28 times more economical.
The exchange rate makes the equation volatile and unknown as well.
If you're bullish, like many are, mining now will be as valuable as it was for the first few people who were mining with their CPUs in the beginning.
EDIT: If the exchange rate rices, then your revenue per month in USD increases as well.