m1.xlarge is an AWS EC2 instance with 4 vCPUs, 15 GiB memory (Intel Xeon Family). In US East (N. Virginia) it costs $0.35 per hour on demand ($255.50 per month) for Linux; a 1-year reserved instance with no upfront costs $0.224 per hour, 36% less. Spot capacity is about $0.0688 per hour. It is sold in 9 regions.
Prices by region
USD per hour, Linux. Reserved prices are no upfront, standard. Cheapest on-demand first.