I would be interested to know why Vanbar has such very high prices right across the board. I won't even buy a single roll of film from them. $6.60 a gram forAgNO3!? You could probably source it from places like Melbourne Uni — if you're in 3Y Medicine...

As for AgNO3, IIRC is it +200gm in half that amount of water for it to be 100% soluable? That sounds like a big premium in terms of cost...