The choice as ever is between new, and used and the price you are prepared to pay for your motoring.
For my own motoring needs over the years I have always adopted the bargain basement, D-I-Y maintenance and repair, do lots of miles, scrap it eventually and start the cycle again. My cost/mile includes negligible depreciation and is at a level which is eye-wateringly cheap, compared to going for new, or even the moderate level of used purchase say buying a used for £6,000 and after 4 years or so finding it fetches £2,000 when you have finished with it.
So if you are buying "new" you are going to be paying say 40-50p/mile, used 20-30p/mile, and bargain basement under 20p/mile. If you can afford to go over 50p/mile then don't bother doing any sums just buy what you want

The entry level to EV's is either new, or moderate level of used. Bargain basement entry is a few years away, when hopefully the spectre of the "replacement battery pack" will have proved to be either over-pessimistic, or cheap replacement cells will be available.
....and while this being the French Car forum, the vast majority of second-hand electric vehicles becoming available in the UK ie Nissan Leafs, Renault Zoe's, Peugeot Ion/Citroen C-Zero etc do have a significant French Connection.
So buy a Nissan Leaf , and you need not feel you have been too unfaithful to the FCF, and you could also support the premier UK electric car maker, and the premier UK investor in battery manufacture.Since 1999, Nissan has been part of the Renault–Nissan Alliance, a partnership between Nissan and French automaker Renault. As of 2013, Renault holds a 43.4% voting stake in Nissan, while Nissan holds a 15% non-voting stake in Renault.
So it is with little guilt I post up this link to EVSpeak where there are details of a decent quantity of used Nissan Leafs coming onto the market from hand-backs under PCP deals, offered under new PCP deals from as little as £115 deposit and £115/month for a 36 month PCP. I would hope the the PCP arrangement would be "battery included" but haven't asked the question.
https://speakev.com/threads/lots-and-lo ... pcp.41449/
Regards Neil