how big is he now? Looks like a much bigger tank too! You should seriously try to get the biggest tank you can and see if you can breed that thing. If 1 of it's offspring was a snow, you'd be rich. That is truely an amazing find! Good eye in noticing it's difference from the others. I can't believe that LFS didn't see it!
Little off topic, but: I used to collect coins, and I used to visit this coin store in the city on my lunch break with a friend I worked with. We used to dig through buckets of silver dimes that they had for $.50 each. Mostly mercury dimes looking for the famed 1916 "D" worth anywhere from $350 for a total piece of trash up to $10,000 for a nice one. Well, one day, we hit it! My friend found a 16D in that mess. He gathered up a few other coins and we went to check out. The lady looked at what he had and said "I can't sell you this for $.50". We were both very P.O.d We told her that we didn't come in there every other day and sort coins for THEM. We were looking for those valuable coins in the mess of junk and we should be able to buy it for $.50. She wouldn't have it, so we left and never went back.
Similar story I guess, but we weren't so lucky...