So im doing a search for titanium retainers for the 918 springs, is $239.95 a good price for them??
And is there anything else i need?
already bought head,cam,pushrods,springs,ls6 intake manifold, and all necessary bolts and gaskets
buying retainers.
Is there anything else im missing or am i good to go.
Is it necessary to buy valve locks or spring seats/locator??

 

For the 772-16, if new, yes it looks like a good price.

Better questions may be "what are you looking to accomplish?" You may not need them depending on your application.

 

are the stock ones good and prob be able to be re-used, I only 75k on my car. iv allready spent like $3700 and havnt even installed anything.