there are a few possibilities here:
1) punishments for steroid possession/use will become more harsh causing domestic sources to go out of business for fear of gettin busted. this will drive domestic prices up for those domestic crazy sources with balls big enough to stay in business. the internationals will continue to enjoy success and even greater success.
2) same as option 1 but the u.s govt' will realize that in order to stop the domestic scene they'll have to go after the big international suppliers. i honestly dont think they'll go that route but should they do it and start busting internationals, steroids will become extinct.
3) congress will shortly realize that they're WAY out of hand and steroids will not be percieved so harshly. steroids will be schedule 4 and us bb'ers wont have to pay high prices for human grade stuff. this will probably close the shop down for many UG labs but in teh long run it'll open the door to more domestic sources selling human grade gear... and drive prices down.