Re: All Pi's need USB3!
AFAIK there is no SBC with USB3.0 and gigabit ethernet, much less one for $35.
No ... but you can get the Gigabyte GA-E3800N for around £40, and that has USB3.1 and gigabit ethernet (and a couple of SATA ports, RS-232 and Parallel, etc). That has an AMD APU and isn't fanless ... and you'd need to add a RAM DIMM or two ...
It's not quite Pi-small, or Pi-cheap, or Pi-quiet ... but it's not a world away.