What is avexchange?

Unfortunately, as an AI language model, I do not have access to current information about specific companies. Based on context, however, I can deduce that "avexchange" may refer to a platform or organization related to aviation or audiovisual exchange. It could be useful for trading, buying, or selling aviation assets or audiovisual equipment. It is important to note that my deductions are purely speculative and may not accurately reflect the specific company or organization.