I was just unpacking some marbles I bought on eBay and much to my delight, a green dyed hand-cut bull's-eye agate fell into my lap as I poured out a bag! (see attached).

Here is the lot on eBay:


Can you see which is the agate? I only have one other - a blue one and I paid $290 for it!

I plan to resell the MFC slags at a profit, so the cost for this Mint gem? ZERO DOLLARS