Pros :

~ It gives you a alternative, if other payment options are not available to you for some reason.
~ Bitcoin has been the best performing currency for many years
~ You pay less for the transaction, due to smaller fees < No banks or remittance services needed >
~ Cross border transfers < remittance > is cheaper.
~ The transactions are fairly quick and you do not have to wait for bank transfers to go through to fund your account.
~ You can use them as a reliable Escrow services.

Cons :

~ You will have to rely on eBay as a third party and Bitcoin was designed not to use third parties.
~ eBay will add fees for their services, which will make Bitcoin transactions more expensive.
~ eBay can manipulate transactions, like they are doing now. < centralized control >