advice wanted. too buy a newer used car or fix my transmission

[flooded one]

hey all just wondering on everyones opinion. i've just got my AU serviced and got the transmission serviced and have been told the automatics not really healthy at the moment. they think that the internal seals might be starting too go hard. unfortunatly it had too happen at a rather annoying time as we are moving soon and have a rego for it coming up soon. plus my job isnt really all that secure at the moment. thou i've been told i'm safe. i'm still abit iffy about it. what my options are : 1 get transmission rebuilt. 2. try and get an exchange unit or 3. try and get a newer car. though i would like too trade it in i dont think i'll get much for it as it needs a respray (bonnet and roof). everything else with the car is fine. i've had it six years and have had nothing major happened too it till now. I've been i eyeing of a 2009 FG XT for sale for a while for, $16,500 thou it has 112,000kms on it. I'd like too get something around this price area and around 3-4 years old if i was too upgrade. so what do you think?? upgrade or get transmission fixed or exchange transmission. have been told $2300 for exchange transmission through a shop. cheers