How you think , will it popular to offer ppl buy any goods using btc or alts ? Create website where ppl can paste links on items , name and shipping address, after they will pay X amount of btc, just order this item, using real money and ship to their addresses.
I can't understand it mate, what you are suggesting is first to make a market place(website) where people can buy goods with bitcoin and alt coins which is clear. This is like the service of
https://www.openbazaar.org/I've seen a bunch of such projects. Suddenly these were "baits" of low-trust ICO's - they made shops with real items which you could purchase with their coin, so they raised hype around their project.
If you want to put you idea in reality - you firstly think about trustfullness and safety of your project - otherwise people will not send you any coin.
Yeah it's like a gateway and theme of ICOs that they'll make their own marketplace, "used by many people and companies". But if it's different to that idea and its like a free market place where there does have variety and specific crypto's to accept I think it's possible.