OK, so now you're joking, right? Tell me that there is no way you'd fan on a deal like that.
If you're serious it sounds like the other buyer made the offer yesterday and the seller asked you to delay coming to get it today so he could be sure that the other buyer came, paid for it and took it away. Happens a lot on good deals. I've learned you have to be fast when a good deal appears on CL because they don't last. Sellers will string you along until the item for sale is paid for and gone just to be sure.
I'm sorry you missed on your Ingy. You would have enjoyed it and it would have elevated your image amongst GT
enthusiasts. You will have to get really serious about locating and acquiring a Case/Ingy.
On the other hand, if you are jerking us around and the Ingy is sitting in your shop as I write this you're in big trouble my friend. Go to the shop and do not come out until you have a completed Ingy diesel re-power to show us!