Leatherique/Prestine Clean. Same people, great service. Used it to clean a forty year-old saddle, wonderful. Use it on all leather now. If it'll live through a polluted Dallas seven-month summer, it'll live through anything. I use it on all of of our cars. The wifes jeep leather looked like the passenger side at 95,000 miles: new. My truck at 110,000, new . . and better than when I bought it with 86,000.
LEXOL doesn't begin to compare, and I used it for over 20-years.
As to price, buy in quantity. Use in small spray bottle.