I need some 1 5/8" primary with 2.5" collector short tube headers to replace some 2" ramhorn manifolds. Im not really looking to spend over $125 as I've seen 3-4 sets for $100, just wondering what company's you guys have had good exsperiences with?

Hedman shorties look to be pretty good quality. I have 3 pairs sitting in my shop- 1 sbc Camaro and 2 BBC Chev. The BBs are the coated elites. The Camaro ones(uncoated) look pretty decent and I think Summit/Jegs sells them for your price range.

Theres 3-4 sets on ebay [multible listings] that go for between $50-90, they cant be any good could they?

If they are new and name brand and the seller has good selling feedback I might risk an ebay deal. it he headers are used, I'd be hesitant because they can rust from the inside out and it not be noticable. I gave a buddy a set of hookers that were ealry in the coating business and did not get coated on the inside. They were rusty and had pin holes start showing up after being installed in his rig. Since new ones can be had for a couple bucks more I would go with them. Good Luck with your choice.