To register a package it costs $7.50. To add $39,950 costs $35.35 for a total of $43.85.

To this is added the cost of first class postage. Since a padded envelope can not be registered, I would imagine small box would be used --- maybe $1.06 more?

Now in Spike's case, I am sure he will be purchasing the seller's other killer chip. Therefore insurance would cost $69.35 (for $80,000 insurance)

Grand total for both chips shipped would be under $80.