once they expire, no... however if you are able to grab em directly from tdnam.com, namejet.com or snapnames.com for example during the auctions --- they can and will pass "seo juice"
exactly, so you should acquire them from the domain aftermarket , TDNAM is ideal for that, approximately dailly 15.000 expired domains listed really great opportunity... and do you know that you do not have to bid for aged domains in tdnam auctions, because there are alot of aged domains also in the closeout firesale section, so you can grab them for $5 + reg fee = $12.69 I found really good domains and I was able to sell them just after I post them that was really amazing..
Yes,its not the quality juicy that it passed. And beside that,you can fully utilize the domain that have backlink built over 10 year time to increase your site reputation and link popularity.