I was curious if there really was a relationship between selling price and shipping cost. To get a decent sized sample I checked on HR Friday the 13th chips in the completed auctions. Here is the tally (in ascending order by date sold- oldest first):

Price Shipping
$50.00 $1.75
$49.99 $2.00
$50.00 $2.00
$49.99 $2.00
$50.00 $2.00
$49.99 $2.00
$49.99 $2.00
$49.99 $2.00
$50.00 $1.75
$47.99 $2.00
$49.99 $2.00
$49.99 $2.00
$50.00 $1.75
$50.00 $1.75
$50.00 $2.00
$49.99 $2.00
$49.99 $2.00
$49.20 $1.80
$48.75 $2.25
$50.00 $1.75
$50.00 $1.75
$52.00 $1.75
$49.99 $2.00
$44.10 $1.00
$51.00 $1.00
$43.00 $1.80
$50.00 $1.75
$46.59 $1.75
$49.51 $2.00
$45.80 $1.00
$45.00 $1.00
$49.20 $1.80
$47.00 $1.00
$42.02 $1.00
$42.02 $1.00

The only conclusion I can get from this is if you have a hot new chip - sell it as fast as you can because the price will go down over time.... And, that I am glad I do not collet HR chips.

Also interesting the ones that did not get any bids(same order):

Price Shipping
$49.99 $1.00
$49.99 $2.00
$49.99 $2.00
$39.00 $2.25
$48.99 $2.00