People here are selling for a lot cheaper than 75% rate... just look around for 5 mins.
I'd feel more comfortable buying physical cards than random e-gift codes.
Keep in mind though its not hard and takes 2 minutes to convert these e-gift codes into a physical card. I do it all the time
How?
Go to the store, get a gift card (free, just bring it home), register it on your starbucks account, register the egift on your starbucks account, transfer to the physical card code, and it will be on there. Or go to the store with your virtual balance, and just buy another gift card