Charging reasonable costs (ie: the kind of fee that the Driver License bureau charges, ergo, $10 or so) for the first ASN is reasonable.
The drivers license world defrays their fixed overhead costs across millions of drivers a year who get renewals done - there are not that many ASNs and other things done a day. Again, as a businessman Karl, you should understand that already.
Charging a lot more (say, $1,000) for the second and subsequent ASNs (or even an increasing fee, say $1k per ASN, so the second is $1k, the third $2k, etc) is also reasonable. Why? Because there are ways to skin the cat that don't require this, and if you're going to use more than a trivial amount of a limited resource then a "resistor" is reasonable on that use.
You are either charging a price to defray costs, or you are changing a price to encourage/discourage behaviour. In the two cases, the answers to "what is the correct price" are radically different, so we need to decide what the goal is before determining if the current price is good or bad. Doug