I was leaning towards "I wouldn't do it" until I read jsmorphs2's post. It hadn't occurred to me to look at your collection, but looking at it, I agree with that post entirely. So now I'm much stronger in the "no way" camp.
Most of the "value" that you'd be receiving is in 2 things. First the clown female. But you already have 3 phets, and between the 3 it is extremely likely that at least one is het and then you'll be able to produce your own clowns. Admittedly, not as many with a het as with a visual, but you'd be trading away your ability to produce pieds at all.
Second is that the 2 males are big proven breeders. However, while I know they do sell for more, I'm not convinced there really is that much more value in proven breeder males than there is in hatchling males. I have not personally done this, in fact I haven't done any breeding at all yet (next year!), but I have seen so many posts about so many different people growing up a hatchling male and having him breed his first winter, that it seems reasonably likely that if you tried it, you'd be successful at it too. If I'm wrong about this, hopefully someone with more knowledge and experience will say so.
So I say if you want an albino and pewter male, buy hatchlings this year. Hold on to your big pin girl. She is worth more as a breeder than she is in cash or trade.