Can seller add additional shipping charges after item is already paid for?

[canadamom_of_2]

I made a purchase and paid for the $3.60 that the seller wanted for shipping. I just recieved an email this morning that they want to invoice me an additional $3.85 for shipping. Can a seller do that? It's already paid, shouldn't they just have to take the loss?

Item number was 330755001903

[dmil8030]

Here's a thought, -- if you want the shoes as badly as all that, you might ask yourself if it is worth the $3.85 to get them.  The seller is not ripping you off because there is no way they will ride for 3.60.  So if you have to choose between getting a refund according to ebay policy or compensating the seller by 3.85 and getting the shoes, - well, you decide.