You real new in SL, learn first the default SL rulez as CREATOR or SELLER!
If you buy a item that cost some thousand of L$, will the customer not burning the L$ if they sell the wrong item, because you can buy demo's.
I know all the time creators sell Demo Versions 4 customer, the same in "xstreetsl - Second Life Commerce" you know that now as "https://marketplace.secondlife.com/".
If you dont like that kind of selling, don't buy that from the creator and use a other creator.
If you buy a box with your items, then look 4 SANDBOX or REZPLACE to unbox them, they are freebie areas to use.
Some creators have a rezplace near the shop, you need only use your eye's.