I'm not an expert, but have some experience. First, do not clean the coins with any method. This will greatly reduce any value they have above face or spot value. Dimes, quarter dollars, half dollars, and dollar coins prior to 1965 are 90% silver. So, even if common and poor condition they will retain the value of the silver they are made out of. Value above and beyond that will be determined by rarity and condition (like every other collectible out there). Photos that show up will be needed to comment on condition. Rarity can be determined by many sources online or at your library. The mint kept pretty meticulous records of what they produced each year and what they held back and reused in future years.
Anything specific, please post a photo and I'll be glad to comment, but generally the best source for value will be completed ebay auctions. Make sure you're looking at the same year, mint, and condition.