I guess I am "used parts" adverse, but I am shying away from salvaged battery packs. The main reason is you don't know where they've been and how they were treated. I know Leaf packs in particular are subject to degradation because there is no active cooling. I would rather spend more now then be constantly replaceing or worried that the pack was going to fail.
I've purchased several Leaf and Tesla battery packs without problems. The Leaf packs were easy, I used Wolf's Pack Sniffer (
here), and car age/mileage as a guide. I was very happy with the results.
For the Tesla packs I just used the age of the car and it's mileage as a guide. Today I would happily buy individual Tesla modules from a reputable source like
EV West although undoubtedly buying a wreck with a complete battery is the cheapest option.
One of the things I like most about OEM modules is the ability to replace them in the future... it's already difficult to find some early prismatic cells but I'm willing to bet I can buy a Tesla Model S module in 10 years time.
I don't know where you're based (can you update your profile?) but a quick look on eBay has a 2015 Leaf pack in the US for 4,500 USD (
here) and another in the UK for 3,445 GBP (
here). Both packs have been around for a while so a deal can be done
