So, I recently ordered an M 80-200 off ebay for quite cheap (less than $10 minus shipping), and it arrived today. The description stated that it was in "great" condition and had "no issues." Due to a lack of real descriptive terms, I realized that oil on the aperture would be something that I might have to deal with, as the seller did not appear to know too much about lenses. As it is, there is some oil on the aperture blades, but the odd thing is that it is only sluggish some of the time. If I flick the lever a few times, it is slow at first but then appears normal and snappy. With sample shots, I haven't noticed any overexposure and the metering appears to be working just fine. Besides the oil and some zoom creep (is that expected on the M 80-200?), it works great and is cosmetically pretty decent. Images are quite sharp
So now I'm wondering, is it worth it to do anything? I kind of don't want to go through the hassle of sending this thing back, as the shipping ended up costing more than the lens itself. I know that the problem will only get worse, but I wouldn't mind experimenting and trying to clean it myself at some point in the future. Does anyone here have any experience cleaning this particular lens?
Picture of the oil for those who care