Yes theres actually no correlation between spot 'paper' price and the price on 'the street'.
In fact, if you want the true price of silver you just need to look on eBay! The 20 ounces/ day that get's moved through eBay is a far better indication then the hundreds of thousands (millions) of ounces available to large buyer's at spot 'paper' price.
You want lots of silver? Buy a few futures contract, when they expire the seller will contact you informing you with their choice of a few different delivery points, there you are free and contractually obliged to take delivery, and you'll get your 'paper' price.