This code seems to work on "eligible" private sellers, for both new and used items.
Q: How to find out eligible sellers/items?
A: Do a search on the item you want, the "eligible" ones will show 7% off with coupon. Max $300 off alongside them.
Conditions. This offer entitles you to 7% off the pre-coupon purchase price (excluding postage costs) on Eligible Items during the Offer Period, when you spend $30 or more (excluding postage costs) in one transaction, up to a maximum discount of $300 per transaction. Multiple items may be purchased in 5 transactions (up to a maximum of 10 items per transaction).
"Eligible Items" means items listed on eBay.com.au where a link to these terms and conditions and the coupon redemption code C2CSEP is found in the item listing.
Redemption. To redeem this offer during the Offer Period, enter the redemption code C2CSEP into the redemption code box during checkout. This code cannot be used in conjunction with any other eBay offer, coupon or voucher. You can only use the redemption code 5 times during the Offer Period. The code is provided to you as an eBay User and the limitations on its usage apply on that basis even though you may have registered a number of different eBay User IDs.