How much does it cost to have a saddle professionally re-dyed?

I am buying a saddle for about $1100 less than the retail price, practically new. However, i don't get to choose the color, and it doesn't match my bridle. I don't trust myself to darken it with oil myself, as it is a considerable investment and i've never been so great at stuff like that. Please don't suggest i do this myself. So how much would it cost to take it to a professional and have them re-dye the leather?