Suzuki 2 Strokes

i put this in the wrong place originaly .
i have been offered two 1984 gs550es bikes one is running and the other alegedly just needs a battery and carb clean.
both have been sitting for a long time .in the back of a garrage
but both have titles.
have not seen them yet
but its a bit of a drive so if i go i only want to go once and do the deal.
any ideas on approximate value.
i very much doubt the will be mint but probably fair condition.
this is through a freind of a freind etc (owner droped down dead)
thanks in advance .
mark

NADA Guide seems to generally be useful.
Their 84 GS550ES prices are here: http://www.nadaguides.com/Motorcycles/1 ... ESE/Values

Thanks for that .
a big help.
i guess $500 for the runner would ok
thanks mark