You can't buy smaller than a single /24 through the officially approved arin, ripe and apnic transfer processes, since that is the minimum size of individual netblock you can announce into global routing tables.
An asn is not something you buy from a third party unless acquiring a whole corporation that already has one, since there is no real shortage of them, you'd get your asn from your regional registry.
An asn is not something you buy from a third party unless acquiring a whole corporation that already has one, since there is no real shortage of them, you'd get your asn from your regional registry.
Expect about $50 to 55 per IP now.