While I haven't tried to use this offer yet, Gumtree offer to list 2 items per month for free on ebay, without listing or selling fees.
I thought I would have a look at the terms and conditions today.
In the exclusions, it states:
"The promotion is only valid for Free Insertion and Final Value Fees on the first 5 listings that result in a Qualifying Sale per month during the Promotion Period. Final Value Fees are the selling fees charged on sale of an item, calculated as a percentage of your total sale price. Insertion Fees, depending on how many listings you have already created, as well as optional upgrade fees (such as reserve price, subtitle, etc.) may apply; learn more about seller fees, including the number of Free Insertion Fees per month by viewing our complete fee table".
Anyone want to take a guess on what it means by the first 5 listings? Are they saying that if it is not within the first 5 items sold, then the offer is not honoured?
I think this thread may answer my query.
https://www.ozbargain.com.au/node/555110