I want a power supply that is:
+80 bronze or better
500 watts or below
Lasts a very long time
do you know any that fits these requirements?
inexpensive is a relative word as everyone has a different opinion of it, how much are you planning on investing on it, ppl usually cheap out and they shouldn't.
Usually all the bronze less expensive ones are tier 3
Power Supply | EVGA 500W 80+ Bronze Certified ATX Power Supply | $32.99 @ NCIX US
For budget builds both these PSUs are fine.
Power Supply | Corsair Builder 430W 80+ Bronze Certified ATX Power Supply | $19.99 @ Newegg
I would go with a evga 500 watts bronze.