Must be super-rare ;)

He just placed the decimal point too far right

I know ... I know ...

Yep, key stroke stutter. Easy to do and tough to correct. In most cases you have
to re-list the item. PIA. Looks weird listed though, but I see it was re-listed with the
correct price.
I've purchased a lot of engines from Dan, Bees, horseshoes and postage stamps.
All doubles or multiples from his collection. None of them ever mounted or fueled.
I have a '63 postage stamp with a narrow neck case and a thin wall #1 cylinder on it's
way here. $27 shipped, as were almost all the engines I've bought from him. I'd pay
$27 for a virgin thin wall by itself(tapered bore ya know).
I also have well over a hundred 5-3 safety tip props, but that's another story.
https://www.ebay.com/sch/california-dan/m.html?item=384170227721&ssPageName=STRK%3AMEBIDX%3AIT&rt=nc&_trksid=p2047675.l2562
Bob

Most that suffer through my threads know that I like to buy mostly junk engines and other Cox C/L items.   But, on occasion I don't mind laying out big bucks for the good stuff.  I once paid $1500 for a mint Cox Mercedes in the box.  But I would think long and hard before I paid $2500 for any OK Cub product.

It is serial number 001. Still too expensive.

Same engine /photo for $25 here:

https://www.ebay.com/itm/384196548752?_trkparms=aid%3D1110002%26algo%3DSPLICE.SOI%26ao%3D1%26asc%3D20200818142055%26meid%3D259b60835ee84b0eb8e7110f18b47264%26pid%3D101113%26rk%3D1%26rkt%3D9%26sd%3D384196524393%26itm%3D384196548752%26pmt%3D0%26noa%3D1%26pg%3D2563228%26algv%3DSellersOtherItemsV2&_trksid=p2563228.c101113.m2108