09Rdx

I知 currently on the market for a used transmission for my 09 RDX sh-awd. To my knowledge the first gen RDX is from 07-12 it just received a facelift from 10-12. I知 wondering if a transmission from a year 10-12 will fit my 09? Of course making sure I choose awd transmissions from 10-12. Asking this because I知 finding better options in terms of price and mileage on the newer rdxs from 2010-2012 then anything 07-09. Also when I choose a 2012 rdx, according to the website I知 shopping from, it says the fitment is only for 10-12 but it doesn稚 say they same when choosing an 09 rdx just says fitment is for a 09. Also curious why a transmission from an 07 rdx with 150k miles is almost $1k while anything 2009 and newer are around 250-500?