I'm looking for a rare first edition of 'Don Quijote de la Mancha' on IberLibro.com. Please find the most expensive first edition listed. For this specific listing, provide its full title, the author, the price, and the name of the bookseller. Also, clearly state how the website indicates that this particular listing is a 'first edition'.
Navigate to 'https://www.iberlibro.com'. Search for 'Don Quijote de la Mancha' using the main search bar. On the search results page, apply the 'Primera edición' (First edition) filter under 'Más atributos' (More attributes). Sort the filtered results by 'Precio más alto' (Highest price). Identify the first listing (which will be the most expensive first edition). Extract the full title, author, price, and the name of the bookseller for this listing. Note how the listing and the page itself indicate that it is a 'first edition'. Synthesize all collected information into a concise answer.
The agent successfully navigates to the IberLibro.com homepage. The agent successfully searches for 'Don Quijote de la Mancha'. The agent successfully applies the 'Primera edición' filter. The agent successfully sorts the results by 'Precio más alto'. The title of the most expensive first edition is stated as '1880.EL INGENIOSO HIDALGO DON QUIJOTE DE LA MANCHA.RARO 4 VOLÚMENES'. The author is stated as 'MIGUEL DE CERVANTES'. The price is stated as 'EUR 18.000,00'. The bookseller is stated as 'Lauso Books, BARCELONA, B, España'. The agent accurately describes that the website indicates it is a 'first edition' by: 1) the applied filter 'Original o primera edición' being visible in the page title and just below the main search results heading, and 2) the explicit text 'Original o primera edición' and '1ª Edición.' appearing within the listing details itself.