I'm pretty new to the hobby, and I have only hunted new-ish parks and sports complexes, but I have around 3700 coins total. Two silver coins, 14 Wheaties, 9 silver rings, three 14k gold rings, and quite a few (around 20) sterling silver charms and necklace pendants.
I have recently started digging all solid targets from about 45 and above on my ATMax and enjoy finding the random and interesting things. I found an Italian silver necklace and 925 cross at a 49 VDI. I guess it all depends on where and how you hunt. With as many coins as I've found, and the depth that I found the two silvers at, I'm pretty sure that those were pocket change and not vintage dropped coins. Before I started beeping, I'd discover silver change in my...change. Find enough modern dropped coins, you're bound to find the occasional silver.