Honda civic vx/cx/hx/insight are all good choices, although I wouldn't recommend an insight if you have emmisions testing in your area.
Metro is a good choice
Older saturns.
There are options. For 5k you could get a good condition insight with a good IMA pack, and get 65mpg at 70mph no problem. But can you stomach the 2k for a replacement IMA when it goes out?
The VX you can probably get about 48ish at 70mph, cheap to maintain, parts are literally everywhere. For 5k you could probably buy two, lol.
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