For $400 you should be able to assemble a 'dream' 35mm system.

For about $175 I got this older long-lasting mechanical/manual focus stuff:
2 Yashica FX3 bodies
2 Yashica FX3 Super 2000 bodies
2 Yashica 28mm f2.8 ML (7 and 8 element)
1 Yashica 28-80 ML
1 Yashica 24mm f2.8 ML
1 Yashica 35mm f2.8 ML
1 Yashica 50mm f1.4 ML
1 Yashica 50mm f1.7 ML
1 Yashica 50mm f2.0 ML

In another buying spree for $400 I got all late/current electronic auto focus stuff like new:
Nikon F100
Nikon F75 & battery grip
SB28 speedlight
Nikkor 35mm f2.0 AF & hood
Nikkor 50mm f1.8 AF & hood
Nikkor 28-80 AF