Something like "wanted" classified advertisements is needed. Silk Road only sell offensive merchandise, no method to post wanted ads. Interested in purchase electronics, other legal unobjectionable products. Does website like this exist?
The Marketplace on BitcoinTalk can be used. Simply prefix your post's title with "[WTB]" which means "Want To Buy".
Also, the Bitcoin-otc marketplace can be used to place requests, if you are looking to buy.
It is 100% legal and geared towards indie artists.