Those i the paper are probally mexicanized SR5's .
If you want an OK condtion GT-S hatchback your definately going to be spending more than 500 .
You could probally find a pretty clean SR5 Coupe , maybe Hatch , for a few hundred with like a blown motor or something .
I bought mine really cheap , motor and tranny were 200 , harness was 100 , ECU was free .
Also the GTS has 4 wheel disc's and the SR5 only has front wheel disc rear whell drum . I got my GTS rear end for 50 $'s . It's non LSD though . Kinda sucks .
With getting a GT-S model AE86 and/or doing a conversion look at spending about 1K . Your going to want to replace bushings and probally do springs and shocks as stock ride height really sucks

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Hope this helps