It's tempting to fire off a reply, but calm down with a few deep breaths. Then ask yourself if the email really deserves your attention. While you may feel offended, don't let this person dictate how you feel or the tone of your day. Focus on what's right for you. Ask yourself, "What am I accomplishing here? What will happen if I confront this person? What will happen if I don't?" We all communicate in different ways, and writing isn't a strong skill for everyone. What one person believes is a professional, direct statement can come off as brash or rude to someone else. Don't assume right away that they meant to be rude. Language or regional differences can cause miscommunications. When people try to use sarcasm or humor in an email, it is often misconstrued as rudeness. Respond asking for more information, citing specific statements that you'd like clarified. Sometimes rude messages are just poorly worded. For example, your coworker may have sent you a message saying, "I hope you find time to actually get your reports done today." You could respond, "All of my reports are complete except the one that's due tomorrow. Are you needing a draft copy for a project today?" Don't demand to know what they mean or be curt. For example, don't ask, "What's that supposed to mean?" or "What are you trying to say?" Talking to the person will allow you to better hear the tone of their words. Visit their workspace or call them to discuss your shared work or topics related to the email. Ask them to explain the rude statements from the email. Say, "I had a follow-up thought about the project and thought it'd be easier to say it in person. Do you have a minute?" You could also say, "Your email suggested that the specs were supposed to be ready already, but the due date they sent me said they weren't due until next week. Am I working off of the wrong timeline?"
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One-sentence summary -- Decide if it's worth your time and energy. Avoid making assumptions. Ask the sender for more information. Talk to the sender.

Just as you did to create an estimated value for the car, gather any information you have regarding the year, make, model and trim of the vehicle. Make notes of any options the car has that may increase its value. It's better to have more information than you need to ensure you can get the most accurate value possible. You may also need to provide the VIN number for the vehicle. Your insurance company will assess the value of your vehicle in order to determine the projected cost to provide the car with insurance coverage. Call your insurance carrier and tell them that you would like to assess the value of a vehicle you are considering purchasing and insuring. They will connect you with an agent that can assist. Your insurance company will need to determine the car's value in order to calculate what they will charge you for coverage. The insurance agent will ask you a number of questions regarding the vehicle. Tell them everything you are able to in order to establish the most accurate estimate possible. If you aren't sure of an answer, tell them so. It's better to be accurate. If you know any information about the repairs that were done to the car, that may help. Once the insurance agent has calculated the information you provided against the equation they use to determine values for salvaged vehicles, they will provide you with their valuation of the car. This valuation will likely be much lower than those established by estimates or even the market. The insurance value may be lower than the asking price, particularly if it is a rare or exotic vehicle.
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One-sentence summary --
Gather all the pertinent information you can. Contact your insurance company. Provide the agent with the information you have. Receive a valuation from your insurance company.