I never liked the Andis way back, so never bought any of their updated products since. I expect that just having the service guy check them out will be lots cheaper than buying new.
I use elderly clippers, big Sunbeam in red plastic, given to me for free since they no longer can replace the brushes. Three years of use, body clipping, still going quite well. Red case ones were old when I got my black plastic Sunbeam big clilppers over 40 years ago! Black one is also running just great, love the power of single speed, takes a lot longer to get hot body clipping, than the variable speed models. Have a second set of black ones, purchased cheap used, which got a new cord, tinkered with at clipper repair, work just fine now. If either of them quit working, Jeffers Equine sells new motors inexpensively. I will have husband replace the motor and keep on using them. He body clips the competition horses, usually 4-5 on a day off. So having several sets to rotate while letting the hot ones cool down, comes in real handy. Prevents blades losing “their temper” with heat and dulling up fast. Usually will allow clipping with one set of blades working fine on 2 each, CLEAN horses before needing to be changed for another sharp set of blades.
Then there are the other elderly Oster A-2 and A-5 clippers, which also have been in use here for years. No issues with then that a little oil and a new set of blades won’t fix. I did have to get one lever that moves the blades replaced once, has been fine since. I got them used, so not sure how old they are. I know the A-2 can’t be fixed, again they quit making new brushes for them. Darn, I have so many A-2 blades! I use these smaller clippers on the horses for bridlepaths, heads, never did body clipping with them though. They also are for clipping the large dog about every six weeks in warm weather. She needs her hair now for winter! Do a good job on everything I need clipped.