I have a relatively cheap Sony music centre for playing CDs in my study / office. It is about 10 years old and the CD player has started playing up. The predecessor was also a Sony and that one only lasted about about 5 years before the CD player packed up and at that time I couldn't locate the spares to repair it and a repair at the local Sony centre was not cost effective. However, I kept it as the amplifier was useful.
Last weekend I took the old unit to pieces and and found I could get a replacement laser unit for less that £6 and a replacement laser unit cable for £2.99 on EBay. So I ordered those on Monday, they arrived Wednesday and last night I replaced the laser unit and cable and now have one working CD unit, and I got change from £9 for the cost of the repair.

Next is to repeat the operation on my newer Sony unit and at that price I will keep a spare set for each of them, so when they eventually go again as I suspect spares will be more difficult to obtain by then, where most people these days prefer to rent or lease their music with MP3 files, rather than owning it with CDs.