Over 100 (non cat N etc) under 5 year old EV's under £10k within 50 miles of me. Plenty to choose from; Zoe, Leaf, E-Up, 208, corsa, smart forFour, MG ZS, Ioniq... Etc.
That's in Kent so obviously in more rural areas there choice might be less.
My money would still be on an older i3, they must be close to the bottom of the depreciation now, and I doubt anything like that win be made again soon - full carbon tub chassis etc.
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33kwh model for 10k seems about right.
I don´t think that you can convince a "good old diesel" owner with a 100 miles range car.

Don´t need to sell it to my - I´m on my second EV and #3 has been ordered.