Buyer wanting price reduction after winning auction

[wosanc-64]

I sold a pair of designer trousers and sent the invoice after auction ended.

Buyer now says she has seen the trousers £10 cheaper elsewhere and will only buy if I reduce the price.

Is this a violation of Ebay policy and does it warrant reporting?

[tobiasd4]

Wait 4 days & open unpaid case.

Resolving unpaid items with buyers | eBay