Without considering collector value, which is beyond my ability, I'd say not much more than the price of scrap copper alloys. I was hoping to hear you say they were sterling. The amount of silver on plated items can be worth recovering, but you'll work pretty hard for what little you get. If that is your objective, by stripping the items, the stripped pieces can then be sold as scrap. Recovering silver from plated items by chemical means is likely a wasted effort.
When you are investigating such things, look for marks that say Sterling, or 925, or even lower. I've seen silver flatware marked as low as 720, which describes the percentage of silver contained within, should you not know. Sterling is 92.5% silver, 7.5% copper, so is marked 925. The formula holds true of other variations.
Another notation you may encounter is Coin, or coin silver. That's good---slightly lower than sterling in silver content, with coin silver being 90% silver, 10% copper.
I'm curious what your plan is. I can't imagine you got burned, although you may not have made any money. Might be smart to investigate collector value----which could prove to be very good with a little luck.
Harold