First the question comes to mind if the item was Blessed to begin with? Because for example, I make a Rosary, it doesn’t mean it was Blessed. Or if I buy a chain and add a Cross or Crucifix to the chain, its also not Blessed. Its an item I put together.
This comes from Ebay in regards to Religious Items being Sold.
“If a donation is given for a blessed item the blessing is retained. However, it must be a legitimate donation and cannot be for a specified amount above the items cost to the dealer. If there is any profit made on the transaction the blessing is lost.”
“If you have an item blessed you may give it to anyone and the blessing is retained. If you buy a Miraculous Medal as a gift and, before giving it, have it blessed by a priest, the blessing is retained. Any blessed item may be given to another person, whether that person is Catholic or not, and the blessing is retained. The exception to this is for items blessed under the old regulations on indulgences. These blessings have all been abolished. These blessings were personal and do not pass on to another person if the item is given as a gift. So, if someone were to give you an old indulgenced crucifix or rosary you would not be able to gain the indulgences. The item is, however, still considered blessed in the ordinary sense”. END
Anyway I would take the items to the church upon your next visit and arrive early or stay later and ask the Father/Priest if he would kindly Bless the Rosarys or whatever for for.