Haha no its worthless. Yahoo has little to no protection against scammers.
If I were you I would open your store on atoncer.com, sign up for their official forums and initiate a request to have your feedback ratings all transferred.
Then setup atoncer as your store-front since it is 100% free and drive all the targeted traffic TO YOU using safelists, traffic networks, etc. automated marketing methods and posting on their forums.
Oh and I'd also have one on Bidville, Craiglist and iOffer as all of them are 100% FREE to list everything and the chances of scams= 0% because they have built in FRAUD PROTECTION now which means only verified orders can really nail you.