im thinking about getting a roush 427......is ford coming out with a boss in 09?................if so, ill wait

It's possible some models some years may have morelimited production. I'd get what I wanted while I could and make a few extra heads turn in the mean time. If you wait you might get what you want later or it may be more impossible to get ahold of. If the production numbers are up it's usually easier to find one at a better price too, but it has less individual value until more of the production disappears.