Details from link: http://pages2.ebay.com.au/Buyer_coupons/clickandcollect
By using or attempting to use the redemption code for the voucher, you agree to accept and be bound by these terms and conditions.
How to Qualify for a Voucher:
To be eligible to receive an eBay voucher, you must be signed in to your account on eBay.com.au, make a purchase which meets the minimum spend requirement under clause 3 and select the Click & Collect at Woolworths & BIG W delivery option for all items purchased (up to the minimum spend requirement) during the Offer Period. Go to www.ebay.com.au/rpp/clickandcollect for listings offering the "Click & Collect at Woolworths & BIG W" delivery option.
The minimum spend requirements are:
a. to receive a $50 eBay voucher, spend $100 or more (item costs only, postage not included) in one transaction during the Offer Period; or
b. to receive a $100 eBay voucher, spend $200 or more (item costs only, postage not included) in one transaction during the Offer Period.The offer will commence at 07.00am (AEDT) on 20 October 2015 and end on 23.59pm (AEDT) on 26 October 2015 ("Offer Period").
Only 1 voucher will be awarded per registered Australian eBay account (and if applicable per registered Australian PayPal account) during the Offer Period. If you make multiple purchases which qualify for a voucher under clause 2, you will receive the voucher of the higher value.
You must complete payment for your purchase using an Australian PayPal account on ebay.com.au during the Offer Period.
Purchases of items in any of the following eBay categories are excluded from this offer: Gift Cards (172009), Coins (11116), Services (316), Cars, Bikes, Boats (9800) and Real Estate (11700).Your eBay voucher will be issued on 1 November 2015, and must be redeemed before 23:59pm (AEDT) on 30 November 2015 on www.ebay.com.au, after which time the voucher expires.
The $50 eBay voucher entitles you up to $50 off the total purchase price for one transaction on eBay.com.au. The $100 eBay voucher entitles you up to $100 off the total purchase price for one transaction on eBay.com.au.
Multiple items may be purchased in one transaction (up to a maximum of 10 items per transaction).
You will only receive a voucher if you have signed in to your eBay account prior to checkout; any purchase made using guest checkout is excluded from this offer.
Enjoy
Also don't forget cashback from Cashrewards!
you are most definitely missing something.
Use the click and collect filter in the bottom left corner of the sidebar on the ebay listings page when you search for an item to see whether your item is part of this deal.