Insured for full replacement value with no deductible on about $8,000 worth of gear for $105/year.
To have it as a rider on the house insurance would have been about $30 cheaper, but would also have meant a $200 deductible and insured at my cost only. But I got everything on sale, big sales, and paid only $6,000 for that $8,000 of gear. So for a few more dollars I went full replacement with no deductible. No brainer.
Our house policy covers $3,000 worth of camera gear without a rider. This is useful for the little Canon S5IS , plus the tripod, monopod and other extras that go with the DSLR. Also checked on computer equipment as the laptop is often travelling with me when the camera is ... up to $2,000 covered by the house policy.