I use a rider with State Farm as well. I would have to look up how much it is. They did require serial numbers, value, and I think date of purchase and where. I'm not a fan of the serial number and a complete list, but I see how they would want a legitimate listing and specification.
You have to be careful. Most things I own were purchased long ago from private sales or small dealer. The people are probably long dead and the dealers out of business so the where can't be ascertained too well. Exact date of purchase for some of my collection is unknown. I know the year but that is it.
Value was a pain because your cost is based on your assigned value but that isn't necessarily what you get if stolen. If they ask for a bill of sale, make sure that those aren't the numbers used. I have a bill of sale for 2 Colt Pythons I purchased in the early 80s. Total cost $750. Not what they are worth today. You really need to value items accurately so you don't pay too much but enough so it covers the real value. They do a like for like comparison, IF your rider states replacement or replacement cost. It is their discretion which they pursue. If they can replace less than the value, they will replace it. If they can't due to the cost or rarity, they will ask appraisers for a value and that is what you get.