If they sell it by the pound, why not? a pound of dimes is no different than a pound of quarters.
Junk silver is sold in bags with a face value of $1000. If you are buying thin dimes you are buying fewer ozs per $1000 face value bag. It’s only 90% silver to begin with, so I wouldn’t consider any junk silver a value except the coins are readily recognized.
Personally, I would only consider Maple Leafs.