Originally Posted by Nullific
For a user with little to no opiate tolerance the 80mg pill could equal up to 4 uses. Since you appear to be talking about actual Oxycontins that do not contain acetaminophen you can cut the pill into quarters, crush one quarter of the pill to start and insufflate it. Although oxycodone has a good oral bioavailabilty, insufflation will allow you to feel the effects quicker and carefully adjust your dosage as necessary.
If you wait at least a couple days between dosing then tolerance shouldn't hold you back from reliving the experience at least a few times off the single pill.
Individual reaction does vary of course, start with less if you consider yourself to be small or particularly sensitive to opioids.
$40 for an OC80 is a decent price, $1/mg is not uncommon either though. Some people maybe be paying $80 or more for their OC fix.