$400??? It's worth about $20, if that... depending on the town...
Just because it is pink, doesn't mean that it's rare. That was a clear bottle at one point, but the sun turned it pink over time. It wasn't made that way.
Yeah, They got a name for that. SCA. Sun Colored Amethyst. It doesn't add much value to a bottle. I got a few Bottles like that. Nothing Special & common really. Unless it's from a obscure town probably not worth more then $50 tops. Put it on ebay for $9.99 opening bid & see if it goes for $400?