Is there any market for Silver Proof Sets?

Just the dime, quarter and half (and statehood quarters later on) have any silver (90%), and even the full sets with statehood quarter sets have only about 1.5 oz of silver in them.
In your experience, does anybody buy them, for bullion content or otherwise?
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I break them up for the silver content, except the 1999 and 2012. The earlier silver sets 57-64 , if nice I group on ebay , crappy spotted sets, i break apart.
@doople - I'm glad you asked, as I have a little project now involving silver proof sets, and I've been completing my collection through ebay purchases. So, I can give you a buyer's perspective.
On ebay, a buyer can expect to pay a small but not outlandish premium above the price for typical 90 %. Over the past month, the sets have been trading at 20 - 25 times face. (including shipping, and adjusting for the face value of the non-silver coins) If you are patient, you can acquire them for the lower end.
There does seem to be a very liquid market -- if a set is going for less than a mulitple of 20, someone will jump in. As @jdimmick says, there may be a few "better years". Currently, the 2020s selling for way over spot, but I assume they will come down with time.
eBay; large paying market.
I used to buy the 1999 and later sets at spot then flip them for a small profit on Craigslist.
Pre-65 proof sets I cut the dime quarter and half out of the cellophane and put them in rolls. Usually donate the nickel and cent to the LCS.
@blitzdude - what does a roll of 1964 proof quarters go for?
Not very well these days..... on the retail market today 1/13 you'd be lucky to see spot.
The last one on eBay went for $245 including shipping via auction.
Search on Ebay. Numbers easy to find for completed sales. Many complete silver proof sets selling for $30-$45. Exceptions include 2012, which routinely sells in $130-$150 range, and 1999 which sells in $50-$75 range. Recent years (e.g. 2016 on) selling in $60-$80 range.
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In 1999 I bought 200 1999 silver proof sets from the US mint. Sold them all the way up to $500 per set to coin dealers. It all happened within the of year 1999.
Ah.. the memories.