Purchase of a Business » used between the Seller of business and a potential Buyer of a business. Eventually, you would use a Business Purchase Agreement to complete the deal. Purchase of Real Estate » used between the Seller of real property and a potential Buyer of the real property. You would use a Real Estate Purchase Agreement to complete the deal. Purchase of General Property » used between the Seller of personal property, such as a car or jewelry, and a potential Buyer of the personal property. You would use a Personal Property Purchase Agreement to complete the deal. Other Transaction » used between parties to document a potential transaction, such as providing goods or services over a given period of time.
In the bad example, Jean is too vague, and has a few red flags, like suggesting that her last job didn't end well, and making an inappropriate joke about Scorpios to gloss it over. You can tell people you're great, but it's better to prove it by offering specifics, like she does in the better example. In the second example, Jean's letter body is more clearly organized, and makes sure to give the most relevant details about her career so far.