i bought a 1983 cx650c last week for $ 750.00 with 36,000 miles,bike has a really good power band,strong motor and good power to weight ratio,it is like a smaller,lighter,faster moto guzzi,same horse power as my 1973 moto guzzi eldorado 850,less weight though it has lighter flywheel effect.the keys i had made were from a locksmith,$2.00 each,key brands are Curtis hd 74 and Isco x84 hd74,i hope this will help some