2 things to consider here

1. you will regret selling them IF you plan to get another 4.6 if not then sell them (thats coming from a hoarder of car parts for cars I no longer own anymore).

2. not many folks will pay you what theyre worth in the context of the deal as a whole you will get a much better price if you try to sell them separately. If you do plan to sell and others staking their claim ahead of me choose to pass I'd be happy to entertain a purchase.

Just my .02