want a supra MK3

I want a supra MK3.. well i WANT the mk4 but cant afford it anyway.. i want to know what i should look for when buying a MK3 supra.. i want MT and definatly the turbo model. I want to know what stuff to look for when buying this car and what are some common problems.. i read around and got some info but anything more directed towards the 3.0t mk3's would be very helpful. + any good suggestions to replace the headgasket? how many km do mk3';s usally last? hard on gas?

thanks