We do offer preemptible VMs (https://cloud.google.com/preemptible-vms https://cloud.google.com/preemptible-vms), which for our n1-highcpu-2 (a 2 vcpu Haswell) c

We do offer preemptible VMs (https://cloud.google.com/preemptible-vms https://cloud.google.com/preemptible-vms), which for our n1-highcpu-2 (a 2 vcpu Haswell) comes in at 2c/hr; when you toss in our per-minute instead of hourly billing, we're often 2x cheaper and all without any guesswork or bidding. Disclaimer: I work on Compute Engine, and specifically preemptible VMs.