According to Official Guinness Records,
The most expensive saddle sold at auction is AED (United Arab Emirates) 2,400,000 ($ 653,234;£ 432,310) and was auctioned by Emirates Auction (UAE), at an event organised by Al Jalila Foundation, in Dubai, UAE, on 25 November 2015. The saddle was originally used by the crowne prince of Dubai H.H Hamdan bin Mohammed Al Maktoum.
For a complete list of 2015 records, please visit 2015 Guinness Records in United Arab Emirates.