1998 dodge caravan in Aldergrove, BC

Seller note:

I believe the tranny is going. Have recently had approximately $740 work into it just over a month ago. Aircared until Jan 2014.
Body in good shape as well as the interior. I am a single mother of 3 and in need to sell it so I can buy another vehicle!
Has 320 thousand + km's on it. Engine light is on and the problem is the o2 sensors. I have replaced them in the past but that is the code being read.