there have already been some very good replies to this, but as for is a het pair of albinos worth $600... I think sure they are. It all depends on the level you want to invest on, and how much time you want to invest. If you want albinos, and have $2k to spend, get a male albino and a het female or two. If you dont care what you get, and you can spend more than $600, get something higher price. A pair of pied or clown hets is a very good investment too. All major recessive morph hets are worth their price. There is NOTHING more valuable than adult female hets/homos of a major morph. With that in mind, is it worth it for you to spend $1500 on a 1.1het pied pair or 1.4 on het albinos? In the long run, the 1.4 is going to pay off much better, even though pieds are awsome.
Just my thoughts.