depends on what extension you are talking about. if it is .com, .net, .org, .us , .info then there is no point backordering them as they eventually go into a auction where you can bid and win the domain if ur bid is high enough
if you are talking about .in, .eu .la and other extensions in which LLL domains have not really picked up yet, then yes backordering would be a good alternative if you really want the domain