Long-lasting price-worthy fenders? My bought-as-2nd-hand bikes have plastic fender-attachements which tend to break. When they break, the fender starts to make a lot of annoying high-pitched sound. So which fenders do you recommend to replace the plastic junk? 

Please, do not interpret me wrong, the fenders can be plastic but the attachment-things must be designed the right way. I like the design by SKS in their Bluemells Matt fenders but not wanting to pay extra for the aluminum and branding, have used many plastic-mixture with proper attachments and they have never failed me (now not having the bikes at the hand). Not sure but perhaps price-worthy product, Sunny Wheels, but unknown brand -- cannot get it though. So which fenders are long-lasting price-worthy? 28" 
wheels.

[Update] 

This question has strayed off-topic due to changes by different users and partly due to my ignorance, sorry about that. The main point is not product recommendations. I am looking for timeless/intrinsic tips to find/maintain/control/(or buy if you can justify properly) fenders. Before you say "XYZ, you are changing question.", no I am not:
the junk description is not necessarily junk, it is to some extent in the eye of the beholder.
You mention that you do not like the extra cost of the SKS fenders, but I would say that I have had excellent luck with them lasting 3+ years with no issues at all. 

They are incredibly well made, and while not the cheapest on the market, they are not Honjos @ $100/pair either.