I just had a great conversation with Mark at Elaire Corp on giving the Forum a discount on their Collets. They use PayPal checkout for their cart solution and he said supporting Promo Codes is not something they have implemented yet.
HOWEVER, if you checkout and pay the $8.95 shipping then send them an email ATTN: Mark, and let them know your order number and you are part of the OneFinity forum he will refund $5 back to your PayPal act to help out on Shipping costs.
Hope this helps out a bit, he is a very cool guy and was super eager to help us out.
Have a good one!