SB supercharger......

...Does a $3000 supercharger really ad $25K to a $5,000 car?? I think its out to lunch...

Yes it does. Just like adding a Hemi. :-) (I think that violates some natural law somehow)

With the availability of inexpensive stroker parts I wonder if supercharging/turbocharging is less useful now unless you are looking for absolute max power. One of the advantages of supercharging was constant and immediate power boost across the whole rpm range which a larger engine obviously gives you already.