RE:Reasonable 10x baggerYou are right.
Scandium is one of the most expensive of all the natural elements. Prices for 99.99% pure scandium (RE: 99% min. | Sc/TREM: 99.99% min.) have fluctuated between US$ 4,000 and US$ 20,000 per kilogram over the past decade. Actually more around US$ 4,000.
So an evaluation based on US2,500 would be more appropriate. That would result in an evaluation between 5,000,000,000 to 13,000,000,000. More 20x bagger IMO