128 bit cerificate:
$849 from verisign
$849/yr renewal

$449 from thawte
$399/yr renewal

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Verisign PayFlow Link service:
Used to handle credit card transactions

$179 setup fee
$19.95/month
up to 500 transactions a month

$5 per transaction, 500 transactions = $2500

$17 per month to recoup setup fee
$20 per month to pay off
$37 per month in fees

Maximum:
$2460/$2500 = at best, 1.6% processing fee

additional transactions are $0.10 each
$4.90/$5.00 = 2% processing fee

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Okay. Let's hypothesize we do 1 Thawte SSL cert. We don't actually need
a cert for the transaction piece, since Verisign will be dealing with that.
128-bit for mail.vectorstar.net
$449
$179 for payflow link
$240 for 1 year of payflow link monthly fees
-----
$868 for the year
$72 - $73 per month

15 transactions of $5.00 per month yields $75.00 - we break even.

Let's try it with two certs:
$868 + 449 = 1317 for the year
$110 per month
22 transactions at $5 per month yields $110.00 - we break even.