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If you are the patient type you can try and find used (sometimes even new) equipment like this at estate auctions or even yard sales. I've probably even sold a few on eBay over the years. You would be amazed at some of the deals you can get at auctions. I sometimes have to resist the urge to keep things that I don't necessarily need for myself but are pricey and will likely never be found again for the price I paid. It will require patience and active searching (mostly online, for auctions at least).
Maybe get it tested at the parts store and keep an eye open for a deal for future use.
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I took the battery in question by an Advanced Auto and had it load tested. It was about 85% of rated CCA. I am going to keep the core as it will fit in an old car I have. The tester they used was a solid state unit not the old analog units I am familiar with from my past.