$600.00 is a good deal if it is in good condition.
The trade in value for a '93 CR125 is $720 in good condition and retail value would be right around $1165.00 in good condition. If it is only in fair condition offer him $500 cash.
well it all depends on the condition of the bike if it is in good condition then yea its well worth it if it is in bad condition then it might not be that of a deal.
It sounds like a good price, just check all the major areas of the bike and start it up and ride it a little to check if there isnt anything wrong with it