Generally my pill usage is for the buzz rather than for trying to get a sleep. AFAIK Oxys are quite expensive to buy on the street in America. Over here the going rate for MST is £1 per 10 milligrammes but I've been getting mine for a decent price. Last year I got 19 10mg MST instant release for £10 and for the 100mg they work out at £3.50 each but I never buy them singley. The downside of a high strength Morphine Sulphate capsule is that they come in extended release. I open them up and pour the little balls into an envelope then crush the balls into a powder with a rolling pin, then pour the powder into a Rizla and swallow it like a pill.
For a sleep I find that Zopiclone and Pregabalin work quite well. 450mg of Pregabalin also give you a rather nice euphoric buzz.