Jersey - up to about $60. Be patient and you will find nice ones on sale all the time.
Bibs - both pairs of mine cost about $65 each. I would probably go up to about $100 if I knew they would be awesome.
Sunglasses - Target el cheapos. Usually Ironman or Foster Grant...never more than about $20.
Shoes - just bought a pair for $129.
Helmet - been wearing my $30 Bell for over a year. I really don't understand $200 helmets.
Socks - cheap moisture wicking from Target, like $10 for 3 pair.