I stated this once in the forum somewhere which is a very important argument against Minolta in my opinion which people easily overlook.hem hem. Minolta glass is cheap specially the 50mm f/1.7 but some of the lenses have a design "flaw" in a sense that you can't fully service a lens or restore them in case of fungus or dust. I can't specifically tell which lenses have this problem, but there is a couple.
Lets say your lens has a little bit of fungus or dust inside depending on which element the problem occurs on in the lens you either be able to clean it or throw the lens away simply because there are 2 elements glued together which you are unable to separate from what I have seen. I still love Minolta, my favourites are the XE 5, felt so good in hand and the Minolta x500. My favourite lens is the Minolta MD 35mm f/2.8, the combo with any MD body is just great.
Here is a video which illustrates the problem with the 2 lens elements glued together. Maybe I'm wrong and you are able to separate them but I haven't found any info on this yet. So my advice look closely at the lens before you buy because in the worst case scenario you will not be able to clean it, which in 90% of the cases you can on a canon FD lens.
Being able to take them apart to clean them (Minolta Lenses) is a quite narrow view of these lenses. No good lenses were or are designed to be taken apart by a non skilled person without the correct training. Doing so, you risk upsetting the very fine adjustments that are engineered when the lens is manufactured, nor will they have the absolutely dust free environment where the elements can be reassembled. Then some lenses have multi-start screw threads, how do you know which point to start re-assembly. Nor will the average DIY person have the optical instruments to set the lens back to the exact factory specification.
Why anyone would wish to split a cemented two element assembly defeats all reason. Dust or fungus is very unlikely to be able to get in between the elements.
OK some lenses seem to be more prone to fungus or dust than others (Older zoom lenses seem to have this problem more than prime lenses due to the zooming action sucking in aid and dust), but I would never ever risk taking them apart just to clean up a bit of fungus or getting rid of a bit of dust. I would always leave it to a trained engineer who actually knows what they are doing. O and possiblyK it may cost me money, but so will having to buy a replacement lens or getting it repaired professionally if everything goes belly up!
So, saying Minolta lenses are 'cheap' because they can be taken apart is not a sound argument. Minolta lenses are anything but cheap, they are up there with the best lenses of the period.