There is a gentlemen in New Jersey willing to sell his HP9825A I believe he is the original owner. It has 4 ROM cartridges (that go in the front) and several data cartridges for the slot on the top left.
He is asking $2000 but can probably negotiate (as he didn't find any takers in VCF East). As far as he knows, everything still works (LED lights came on when he powered it up a few months ago). I've met this seller and can vouch for him, but I don't know much about this particular item. I have some photos of it at the bottom of this page: https://voidstar.blog/vcf-east-2023-part-3/ I may try a VCF forum topic about it. Just trying to help him find a good home for the equipment. E-mail/reply direct and I can provide some contact info. (BTW not sure if my cctalk posts are working anymore??) -Steve / voidstar