While Half.com was never set up to directly accept PayPal, there are a few ways you can pay with PayPal on HDC.
Thanks to half.com discussion board members, here is good information on how you can use PayPal to make purchases on HDC:

There are multiple ways to use PayPal to pay for orders at half.com.

1) You can Get a Debit Card from PayPal put that on account with half.com and use it to pay for your purchases. This way you get a 1% discount for your purchases. PayPal gives 1% cash back on any purchase made with the debit card. Hint (You can also put this card on file with Ebay to pay your Ebay fees and get the 1% back.)

2) You can get a Credit Card from PayPal and use it on Half.com.

3) You can use a Virtual Credit Card Number that a little browser add in (from PayPal) creates for you. This should be the most secure as the number is only good for the 1 transaction.

If you log into your PayPal account and click the the Product & Services tab you will find all of these offers.


I hope this helps some people out.  I will be more than glad to update this, if there are other options.
There has been some talk of accepting PayPal on Half.com in the future, but presently there has been no ETA.

http://shops.half.ebay.com/diskounters

I hope you found this guide useful, and wouldn't mind voting.  Thank you!