I had wanted a 28mm lens for the rangefinders but there reallly isn't anything for under $150 and that is if you shop very carefully. But I got a 28/3.5 Super Takumar for the Pentax bodies for $50 and it is like new. I guess I will just have to suffer using a 28mm lens on a SLR. Life is hard.

I would like to add a 20mm but those are around $200 so 28mm will be my widest for now. Anything wider or longer is going to run over $50 so that is probably it.