Yeah, i wouldnt worry until it is like 3-4 weeks past due. I had to wait 3 weeks to a month for a toy i bought for my son, and was getting worried. But it finally came. if they own a store that sells these signs...and have their own website, like you were saying, i think they are legit.

You can go to ebay.com and click on the "my ebay" icon, and click on "items i have won" and it will bring up your auction and the sellers email...so you can email them if you want to clarify the delivery date.