Mine… My Xbox 360 slim only costed 129 euro back in 2012 and to this day still work like brand new, you would think that the disc drive would stop working but no. Never had the need of open it or clean it’s insides. Still great, I just don’t use it anymore since I feel it’s outdated and loading speeds are better nowadays.
ebay is a good source though more expensive, places like marketplace often have decent deals, check out electronics recyclers and wholesalers, if you have any. Those are generally good places to look.