Aloha,
I have pairs of the fish you are interested in. I sell them as pairs, they don't live for that long, no killifish do(relatively speaking). Under ideal conditions you can expect them to live for 2-3 years on average. The fish I have are Aphyosemion australe Cape Est'erias if you are interested, email me.
Aloha, Fred
http://www.killifish.f9.co.uk/Killif...A.australe.htm