This site offers a good selection of vintage hardcore porn for those who like walks down the porn memory lane.
Monthly:
19.95 / $21.07 (recurring)
Multi-Mo:
54.95 / $58.04 (3 months, recurring)
Currency:
Memberships are charged in EURO. You'll see the dollar equivalent to the right of the prices above. You shouldn't have any issues using a US credit card.