Fed-Ex and UPS both offer insurance up to $100 free. This is included in the cost of shipping.
I looked up your $3000 value on UPS.com and the UPS charge is only $27.00 for the insurance at $3000. Of course,the shipping fee would probably be about $10-$15 depending on weight.
The problem is when you go to the shops, they charge you a surcharge to use the UPS or Fed-Ex services. Their charges are usually quite high.
If you have a local Fed-Ex or UPS facility, you can go there and ship your packages without paying the additioanl surcharges. Or, you can create an account online at UPS.com or fedex.com and enter your package information online, pay for and print your label, attach the label to your box and simply drop off your package at the local "box-em-up" store. I do it this way all the time.
And UPS and Fed-Ex both track packages for free.