Need tie rod ends... whats the deal with ebay parts

I am in need of a set of tie rod ends, not sure if the inner or outers are bad, so I figured I would do both while im in there and getting an alignment.

MOOG parts through summit are $180 for all 4, duralast from autozone are $160, but I found a company selling on ebay for $50 a set which is a crazy price.

http://cgi.ebay.com/ebaymotors/93-02-Camaro-Firebird-Trans-Am-Tie-Rod-End-Ends-Set_W0QQcmdZViewItemQQcategoryZ33593QQitemZ8064811 898QQrdZ1QQsspagenameZWDVW

I know you get what you pay for but is it worth it for 3X as much?

I'm between the MOOG and the ebay parts I think:confused:

I don't know for 50 a set but hey it might be worth a try. If you drive hard I would at least go witht he duralast. But if you like performance it may be the right time for some poly rod ends