Each seller is independent within the site. I never got a response from Storenvy customer service, so Paypal refunded my $. So you take your chances. Ebay will refund if the item is not as described or pictured. Also look at where the item ships from, if it's China, it could take 2 weeks and more.

Your best bet is to pay close attention to the reviews for the seller. Much like Amazon or Etsy or eBay, each seller is responsible for their store and the things they sell in it - which means some things are going to be fabulous and some won't be. So check the reviews and make sure you know that the seller you're trying has a solid reputation with their buyers and consistently delivers a good quality product.