There are a few small devices that can be upgraded or come with a decent amount of memory. Acer's E3-112-C1T9 is a celery-based 11.6" that comes with 4 gigs of RAM and a 500 gig hard drive for $260ish. There's also the ES1-111M-C40S with a 32 gig eMMC drive for $145 on Newegg right now. Specs say both can have their stock memory upgraded to 8 gigs. One stick in single-channel mode, tho.
I got an Asus T205XA for $130 that's good enough and it's smaller and lighter than either of those Acers. Also has a much longer run time on battery. But the Acers have gigabit ethernet, USB3, and full size SD and HDMI. You can have cheap, small, or perfect specs. Pick any two. :) I've only bumped against the 2 gigs in the X205TA a few times.