Paypal or Dwolla would be ok with me.
Here's the cheapest group buy I could find:
https://bitcointalk.org/index.php?topic=277332.0at 0.33 per eruptor and assuming you are in the US:
Paypal:
Mt. Gox weighted average rate (currently $122) plus a 7.5% premium (to cover my paypal fees and a small profit margin for myself).
+
$10 for shipping (priority sm flat rate with sig conf)
+
$5 for insurance (optional)
Dwolla is the same: with 4% over Gox (since I have fewer fees) instead of 7.5.
If you are interested, please PM me.