"A few top sellers" account for more than two-thirds of eBay's total sales, according to the company's European vice-president.
Clare Gilmartin made the claim during an interview with the Financial Mail Women's Forum published this weekend. She said around 38 per cent of sales now come from just a few of the major firms trading through the site, and these businesses are offered additional support to help them maximise sales.
Gilmartin said: "We work closely with these firms to ensure they have the support they need, for example, dedicated account managers and other help.
"We also speak to buyers every week on a range of different topics, including what they think of eBay, and whether there are problems or issues we can help with. We take their views and comments very seriously."
But while eBay is clearly proving to be a key source of revenue for major brands such as Superdry, BMW and Canon, small companies and entrepreneurs are making a living from the site. It's estimated that there are now about 180,000 small and medium-sized business operating on eBay, while 45,000 small firms have started trading through the website since the start of the recession.
eBay's "level playing field" is now officially dead. Big retailers, sellers with a £1m turnover and those who form part of the "few top sellers" who deliver 38% of eBay sales are now priority, according to eBay executives.
Many eBay sellers will say that this is hardly news. And they'd be right. But finally, in the past few days, interviews and press releases from eBay have clearly confirmed a strategic focus on the very biggest of eBay sellers.
Clare Gilmartin, the Vice President of eBay Marketplaces is reported as saying: "Figures show that 38 per cent of sales come via a few top sellers. We work closely with these firms to ensure they have the support they need, for example, dedicated account managers and other help."