It's $0.20 (Some charges are in $) and the listing stays live for three - or maybe four, can't remember - months. On each sale, there's a transaction fee of 6.5% and a payment processing fee of 4% + 20p.
As @krafty-creations says, if you have listing variations, there is a $0.20 charge for each item on the invoice. For example, if a buyer selects 10 items, you'll be charged $0.20 x 10, plus the transaction and processing fees. That can take a hefty chunk out of the sale. Also, I think all the pricing data I've quoted is +VAT.
Once you hit an annual turnover of $10,000, you'll be compulsorily enrolled in the off-site ads program. Below $10,000, it's optional. I think it's an extra 12% if the sale comes from an offsite ad - but you can check all this in the help text if you're prepared to dig around. Etsy have also discovered the money-making potential of halo attribution for off-site ads so, like eBay, the buyer looked at one item from an off-site ad but bought something else - and you get charged extra.
I find that Etsy fees are marginally less than eBay fees. If I didn't have variations, the fees would be a couple of % less.
Another difference between the sites is that eBay is totally up-front with the basic fees and the financial statements are easy to read. eBay wants your money, it gets your money, and it clearly shows exactly what it's taken and why. Etsy's a complete muddle. If I were VAT registered, it would drive me mad.
