need help on 240sx questions

[carkid619]

hey i was wondering, i have a 1970 buick lesabre custom thats a prodject car(bout 85-90 percent done) and i need another driver, i found a 95 240sx for sale for 3800, its got a ka25det and has the engine overhauled at hedals, 2000 on motor 68000 on car.its turbod,has some upgrades,coilovers,intake etc. bodys in good condition,kinda crappy paint. does anyone know if it sounds legit? and whats the feud between the ka and sr? i hear ppl say the ka is better or the sr is whats the big deal? please would like some help,
thanks,
carkid.