yes you can use them for churn and burn or Sell those domains in godaddy auction may be you will get better price.
actually those don't have good da/pa, PR thats the point I'm letting those go. Only have age, good majistic trust.I've sold domains used as part of a pbn on Godaddy without issue. People will also pick up junk there also which always surprises me but a clean domain with good metrics usually sells for a fair price.
If the domains really have good PR/PA/DA, give Flippa a shot also.