I will use a randomizer from 1 to 10,000 (if the number of tickets sold are less than 10,000, say 8564, the randomizer will be set to draw from 1 to 8564 and so on).
Scam!The way to do it properly is to use data you can not manipulate (easily) like part of the hash for some future Maxcoin block. But I guess you will
not go with such approach, it would massively reduce your chance to win this lottery.