Is the following practice allowed? Additional charge not in the ad

[justaman57]

Your invoice for eBay purchases: 2010 VANCOUVER OLYMPIC & PARALYMPIC COIN COLLECTION (QUARTERS & DOLLARS) (181302644169#)

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eBay ebay@ebay.ca	Jan 22 (2 days ago)
to me

eBay sent this message to Tim Fagan (justaman57). Your registered name is included to show this message originated from eBay. Learn more.

	Invoice

Dear justaman57, Thank you for shopping on eBay! Your total amount due is US $25.00. More details about your purchase are included below.

Item # Item Title Quantity Price Amount

181302644169

2010 VANCOUVER OLYMPIC & PARALYMPIC COIN COLLECTION (QUARTERS & DOLLARS)

1

US $6.50

US $6.50

Subtotal: US $6.50 Shipping and handling via Standard Shipping: US $6.00 Seller discounts (-) or charges(+): US $12.50

Total US $25.00

[toby_le_pue]

Did you contact the seller and ask them about it..??