Vintage scientific calculators

Found a good stash of vintage calculators a little while ago. Haven't had the chance to post about them til now. Before I scrap them, just wondering if something like this has any kind of more than scrap value. I'm sure being old they have some decent boards in them. But with prices the way they are figured I'd look for collector value before I went that route. I know people look for vintage computer equipment. But what about these?

These can sell anywhere from $5 to $100 depending on the model. Those look like they're good for $15 a piece.

More than $15 on those TI 59's easily.

Don't scrap the vintage scientific or graphing calculators if you come across them. They can bring some nice money, the collectors love them.

BTW watch out for any old HP calculators. Some models can go for $500+

The HP-35 was the calculator that was used on the Apollo missions. There may have been others I expect.

But what was the one that saved their @$$ when the batterys went dead and they had to compute the tempature inside the capsule by timing how long it took spit to freeze from body tempature?

Checked them out on ebay. Seems to be quite a flood of them on there. Prices seem to range anywhere from 5-50 but that doesn't mean they're selling. I have no way to check if they work. These were curb co grabs and there weren't cords boxes or cases on the pile and they all use special battery packs from the look of it. So seeing as they don't take up much space, I'll probably box them up and forget about them for a while.

...this is how I lost my garage... hoping to find it again some day soon