The second time should always be cheaper.
I also agree that you did it fairly cheaply the first time.
Except for one guy (and no I don't know who) there is always someone who got 10's cheaper but I wouldn't look at an RB25 in a Skyline as my first option if that was my goal. Not saying it's not in the list but not number 1 without serious consideration.
With any luck someone we all know might be running 10's with an RB25 soon and without spending much at all!!
How's this for a plan. Cheapass R33 S1 auto, valvebody upgrade, big turbo, giggle gas, somebody finish the list for me.