Daize, I find that with guppies i've bought from the LFS they hardly survive past a few months. The home bred boy my landlady gave me is a year old and he's still going strong. I will need to do the painstaking task of uprooting everything to find the body. I have 2 chinese algae eaters in that tank plus snails so the chance of a body being recovered is pretty slim.
/www.ebay.co.uk/itm/PANDA-PLATY-PEACEFUL-TROPICAL-FISH-NEW-STRAIN-/280720214260?hash=item415c3a88f4