Paying for a purchase

[oldguss]

I was in the process of making a payment for a purchase. while I was checking out this pop up for a pair of Goff gloves came up instead of paying for shoes that I was buying I had payed for gloves instead..I never even looked for gloves this came out from nowhere..now I  am out $30 for Goff gloves that I will never use

[ebooksdiva]

I’ve been purchasing on eBay for about 19 yrs and never experienced what you described. eBay doesn’t have pop ups at checkout. You may have pickup adware. I would contact your credit card to dispute the charge. 
Turn on your browsers ad blocker. Clear cache and cookies and do a virus scan. 
Again that pop up was not eBay.