Sometimes you get more than what you pay for
Sears 135mm f2.8, these go regularly for $25 or less, I got mine for $12.
And I got this Tamron Adaptall 2 70-150/3.5 for $5 at a thift store and it's surprisingly good as well. The best thing about it is that it's tiny, weighs less than a modern kit zoom and it even has a (albeit cheap) built in hood
IMAGE LINK: https://flic.kr/p/npsd5k IMG_6468.jpg by EverydayGetaway, on Flickr
IMAGE LINK: https://flic.kr/p/nxmkf6 IMG_7269.jpg by EverydayGetaway, on Flickr
IMAGE LINK: https://flic.kr/p/nPxmKB IMG_8546.jpg by EverydayGetaway, on Flickr