If that is the case , then that is your bargaining chip.
Wether it gets worse or not , you will not know until you put some miles on the car. I know guys who have driven 104 with a gasket oil leak for some time b/c the leak is minor and they usually do not seem to effect either the coolant or the compression.
Myself..if it leaks at all, it gets changed.

I would also go into the diagnostic box in front of the battery and get all the stored codes...that would be very telling on that chassis.....and if it has ASR, that is a liability rather than an asset on that chassis.

http://www.peachparts.com/shopforum/showthread.php?t=107630

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A Dalton