I don't know exactly which item you bought or who sold it so I can't comment on the specific ad.
But you have done most of the right things.
You carefully read every part of the description, which is the major thing.
Then after you bought it, you promptly paid for it. Is that right? That's what it sounded like.
Unfortunately yes, it could be a scam. It can be hard to tell 100% if something is a scam but there are some warning signs as you realise. A seller with no feedback and a flurry of big sales of new stuff at surprisingly low prices raises a lot of red flags to me.
If you see something like this in future, I'd personally steer clear, don't bid, don't pay over your money. On the other hand, you can sometimes find things at very good prices and if the seller has a reasonable recent track record, probably perfectly safe to buy.
Now, with this purchase, if you have won an auction or bought it but not paid yet, then just don't pay. Simple as that. Nothing drastic will happen.
On the other hand, if you have already paid (and I sense you have), then wait till the expected date of arrival and open an item not received claim with ebay. Follow through, get your money back a few days later. If for any reason that didn't work, make a paypal claim.
