The commercial construction industry has seen a cost reduction over the past year of approximately 25%.  That means that your finish out that cost $75.00 psf before would now cost you about $56.25 psf.  Match these cost savings with the price reductions for existing commercial spaces and you could be saving six figure numbers on a new office purchase.
Here is an example of a typical shell cost of $175.00 psf + $75.00 psf for 3,000 sf which would cost you $750,000.00.  If you purchased a shell for $125.00 psf + $56.25 psf for your finish out, your total would be $543,750.00.  Your savings would total $206,250.00, which on a 6.25% interest rate, 25 year amortization loan your monthly payment would be reduced by $1,353.51.